Solving proportion word problems.

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 to solve a word problem?

Back

Identify the two ratios involved in the problem and set them equal to each other.

Front

What is the cross-multiplication method?

Back

Cross-multiplication is a method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If 14 out of 50 fish are trout, how do you find the expected number of trout in a larger population?

Back

Use the ratio 14/50 and set it equal to x/7500, then solve for x.

Front

What is the formula to find the expected value in a proportion problem?

Back

Expected value = (part/whole) * total population.

Front

How do you determine the number of homes with computers on a street of 60 homes if 13 out of 20 have computers?

Back

Set up the proportion 13/20 = x/60 and solve for x.

Front

What is the unit rate?

Back

The unit rate is a comparison of any two separate but related quantities when they are combined into a single ratio.

Front

How do you find the total cost for refreshments based on a given rate?

Back

Multiply the cost per guest by the total number of guests.

Front

What is a ratio?

Back

A ratio is a relationship between two numbers indicating how many times the first number contains the second.

Front

How do you find the number of perch if there are 300 sunfish and the ratio is 4:3?

Back

Set up the proportion 4/3 = 300/x and solve for x.