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Proportions A proportion is an equation with a ratio on each side. It is a statement that two ratios are equal. 3 = 6 is an example of a proportion. 4 8 (A ratio is a fraction.)
How can you tell if ratios are in proportion?
Tell whether the ratios are proportional. 4 10 6 15 Since the cross products are equal, the ratios are proportional. 60 = ? 60 = 60 Find cross products. 60 4 10 6 15
Tell whether the ratios are proportional. Since the cross products are equal, the ratios are proportional. 20 20 = 20 Find cross products. 20 2424 5 10 2424 5 10 = ?
Solving Proportions When you do not know one of the four numbers in a proportion, set the cross products equal to each other and solve.
Solve the Proportion 6p = 12 5 p = 10 6p = 60 Find the cross products. Solve. 5656 p 12 = ; the proportion checks. 5656 10 12 =
Solve the Proportion 14 3 = 2g 21 = g 42 = 2g Find the cross products. Solve. 2323 14 g = ; the proportion checks. 2323 14 21 =
Maria Elisa Vanegas 9-5. A ratio is a comparison of 2 things it could be 2 values. Examples 1.A(-2,-1) B(4,3) rise 3-(-1) 4 2 run = 4-(-2) = 6 = 3 2.
SOLVING PROPORTIONS. proportion- Words: an equation that shows that two ratios are equivalent =, b0,d0 Symbols Symbols:
Math 015 Section 7.4 Proportions. Obj: To determine whether a proportion is true A proportion is a statement of equality between two ratios or between.
Math 025 Unit 5 Section 6.6. Solving Proportions.
Math 009 Unit 5 Lesson 4. Obj: To determine whether a proportion is true A proportion is a statement of equality between two ratios or between two rates.
4-1 Ratios & Proportions.
Ratio Comparison of two numbers Expresses the relative size of two quantities as the quotient of one divided by the other Written in 3 ways: a:b or a/b.
Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Chapter 6 Ratio, Proportion, and Percent.
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EXAMPLE 2 Using the Cross Products Property = 40.8 m Write original proportion. Cross products property Multiply. 6.8m 6.8 = Divide.
Writing and Solving Proportions. Proportions Proportion is an equation stating that two ratios are equivalent. Proportional are two quantities that form.
Using Cross Products Lesson 6-4. Cross Products When you have a proportion (two equal ratios), then you have equivalent cross products. Find the cross.
+ Cross Multiplication Objective: We will learn to use cross multiplication to solve a proportion. We will use cross multiplication to check whether two.
How do I solve a proportion?
Finding a Percent of a Number Lesson 6-7. Using a Proportion Set up a proportion that uses the percent over 100. Cross multiply to write an equation.
3.4: Using Similar Triangles
Proportions Section 6.2. A proportion is a statement that two ratios or rates are equal. Solving Proportions If and are two ratios, then If and are two.
1 ratios 9C5 - 9C6 tell how one number is related to another. may be written as A:B, or A/B, or A to B. compare quantities of the same units of measurement.
Ratios, Proportions, and Similar Triangles. Ratios Ratios are like fractions The ratio 1:4 means 1 part to 4 parts and is equivalent to the fraction (part:part)
Proportions Objectives: 1) solve equations with variables in numerators 2) Solve equations with variables in denominators.
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