Solve Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the variable.

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CCSS.7.RP.A.2C

Front

If 3 pounds of hamburger costs $6, how much does 1 pound cost?

Back

$2 per pound.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If Alicia buys 10 pounds of hamburger at $2 per pound, how much will she pay?

Back

$20.

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CCSS.3.OA.A.3

Front

What is the ratio of red paint to yellow paint if Kevin mixes 3 oz of red with 5 oz of yellow?

Back

The ratio is 3:5.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If Kevin uses 9 oz of red paint, how much yellow paint should he mix?

Back

15 oz of yellow paint.

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CCSS.6.RP.A.3B

Front

What does it mean to 'solve for x'?

Back

It means to find the value of x that makes the equation true.

Front

Back

x = 20.

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CCSS.6.EE.B.7

Front

What is the cross-multiplication method?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.

Tags

CCSS.6.RP.A.3A

Front

Back

a = 9.

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CCSS.6.EE.A.1