Solving Applications of Proportions

Read this text which discusses real-world examples of how proportions are used. Complete the practice problems and check your answers. These examples are word problems that use proportions.

Exercise

EXAMPLE 6.45

When pediatricians prescribe acetaminophen to children, they prescribe $5$ milliliters (ml) of acetaminophen for every $25$ pounds of the child's weight. If Zoe weighs $80$ pounds, how many milliliters of acetaminophen will her doctor prescribe?

EXAMPLE 6.46

One brand of microwave popcorn has $120$ calories per serving. A whole bag of this popcorn has $3.5$ servings. How many calories are in a whole bag of this microwave popcorn?

EXAMPLE 6.47

Josiah went to Mexico for spring break and changed $\$325$ dollars into Mexican pesos. At that time, the exchange rate had $\$1$ U.S. is equal to $12.54$ Mexican pesos. How many Mexican pesos did he get for his trip?