Proportions Review

Front

What is a proportion?

Back

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

Front

How do you set up a proportion?

Back

To set up a proportion, you can use the formula a/b = c/d, where a and b are the first ratio, and c and d are the second ratio.

Front

If a grading machine can grade 48 tests in 1 minute, how many tests can it grade in 6 minutes?

Back

288 tests.

Front

How do you find the missing value in a proportion?

Back

Cross-multiply the known values and then solve for the unknown value.

Front

What is the cross-multiplication method?

Back

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

Front

If Vito uses 9 liters of water for 24 pots, how much water does he use per pot?

Back

0.375 liters per pot.

Front

How do you convert Euros to dollars using a given exchange rate?

Back

Multiply the amount in Euros by the conversion factor (dollars per Euro).

Front

What is the estimated population of trout in a lake if 14 out of 50 fish caught were trout?

Back

2,100 trout.

Front

If 9 liters of water is used for 24 pots, how much water is needed for 40 pots?

Back

15 liters.

Front

What is the formula to find the total amount when given a ratio?

Back

Total amount = (part/whole) * total population.