DMR 12/10

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. It can be used to solve problems involving relationships between quantities.

Front

How do you set up a proportion?

Back

To set up a proportion, you write two ratios as fractions and set them equal to each other. For example, if a/b = c/d, then a, b, c, and d are the quantities involved.

Front

If 3 lbs. of turkey costs $6.50, how much would 6 lbs. cost?

Back

$13.00

Front

For every 20 As on a test, there are 14 Bs. If there are 56 Bs, how many As would you expect?

Back

80

Front

If there are 18 cats and 7 dogs at an animal shelter, how many dogs would you expect if there are 72 cats?

Back

28

Front

Max rides 10 miles in 70 minutes. How long will it take him to ride 5 miles?

Back

35 minutes

Front

What is the cross-multiplication method in solving proportions?

Back

Cross-multiplication involves multiplying the numerator of one fraction by the denominator of the other fraction and setting the two products equal to each other.

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/x, then x = (b * c) / a.

Front

How can proportions be used in real-life situations?

Back

Proportions can be used in various real-life situations such as cooking, budgeting, and scaling models.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.