Solving Proportions

Front

What is a proportion?

Back

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

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CCSS.7.RP.A.2A

Front

How do you solve a proportion?

Back

To solve a proportion, you can use cross-multiplication, where you multiply the numerator of one ratio by the denominator of the other ratio.

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CCSS.7.RP.A.2C

Front

What is cross-multiplication in proportions?

Back

Cross-multiplication is the process of multiplying the numerator of one fraction by the denominator of the other fraction to find an unknown value.

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CCSS.6.RP.A.3B

Front

If a/b = c/d, what is the cross-multiplication equation?

Back

The cross-multiplication equation is a * d = b * c.

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CCSS.5.NF.B.5B

Front

What is the first step in solving a proportion?

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The first step is to set the two ratios equal to each other.

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CCSS.7.RP.A.3

Front

What does it mean if two ratios are equivalent?

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If two ratios are equivalent, it means they represent the same relationship between quantities.

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CCSS.6.RP.A.3A

Front

How can you check if your solution to a proportion is correct?

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You can check your solution by substituting it back into the original proportion to see if both sides are equal.

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CCSS.6.EE.B.7

Front

What is an example of a real-world application of proportions?

Back

Proportions can be used in recipes to adjust ingredient amounts based on serving sizes.

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CCSS.7.RP.A.3

Front

What is the relationship between ratios and proportions?

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Ratios compare two quantities, while proportions state that two ratios are equal.

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CCSS.6.RP.A.3A

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How can proportions be used in scale drawings?

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Proportions can be used to maintain the correct ratio between the dimensions of a drawing and the actual object.

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CCSS.7.RP.A.2C