5.7 Solving Proportions. Property of Proportions The cross products of a proportion are always equal.

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Presentation transcript:

5.7 Solving Proportions

Property of Proportions The cross products of a proportion are always equal

Example 1: Alternate Way: you can reduce the fraction first to work with smaller numbers

Example 2:

Example 3: Put binomials in ( ) Use distributive property 2 step equation: to solve add/sub first then mult./divide

Word Problems Be sure to compare the quantities in the same order Write out the ratio in words

Example 4 The local church is making care packages for a shelter. The church can make 8 care packages with 240 food items. How many care packages can they make with 500 food items? 16 care packages

Use the COP to solve problems Steps: 1.) Find the COP or Unit Rate 2.) Multiply the COP by the multiple in the problem

Example 5 Matthew paid $49.45 for 5 DVD’s at a sale. How much would it cost for 11 DVD’s at the same rate? COP It costs $9.89 for 1 DVD Let C= Cost, D=DVD C=9.89D C=9.89(11) C=$108.79

Homework Page 221 (10-36) even