Section 4-4 p. 170 Goal – to use proportions to solve problems.

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Presentation transcript:

Section 4-4 p. 170 Goal – to use proportions to solve problems

Proportion A proportion is an equation stating that two ratios are equivalent or equal.

Proportion A nutrition label!

Proportion In algebra:

Properties of Proportions Cross products are equal.

Together: Do these ratios form a proportion?

Together: Solve the proportion.

Together: 4 out of every 5 people are right-handed. If we have 24 people, how many people do you expect to be right-handed?

Together: These two triangles are proportional. Find the lengths of the legs on the larger triangle.

Students Do these ratios form a proportion?

Students: Solve the proportion.

Homework: p even