Proportions Review

Front

What is a proportion?

Back

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

Front

How do you solve for x in a proportion?

Back

Cross-multiply the terms and then isolate x.

Front

If 2 cups of flour make 12 cookies, how many cups are needed for 24 cookies?

Back

4 cups of flour.

Front

What is the ratio of dogs to all pets if there are 2 dogs, 4 cats, and 5 hamsters?

Back

The ratio is 2:11.

Front

If a car travels 240 miles in 4 hours, what is its speed in miles per hour?

Back

The speed is 60 miles per hour.

Front

How many widgets can a machine produce in 8 hours if it produces 200 widgets in 5 hours?

Back

320 widgets.

Front

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

Back

If a/b = c/d, then ad = bc.

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship between quantities.

Front

How do you find the unit rate from a ratio?

Back

Divide both terms of the ratio by the second term.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, showing the relationship between two quantities.