Problem
QUESTION 8 10 points Save Answer Use a proportion to solve the problem. The scale on a map is \( \frac{1}{4} \) inch to 4 miles. Find the actual distance between two towns for which the distance is represented by 21 inches on the map. \( 324 \mathrm{mi} \) \( 328.5 \mathrm{mi} \) \( 339.85 \mathrm{mi} \) \( 336 \mathrm{mi} \)
Solution
Step 1 ：1. Set up the proportion: \( \frac{1}{4} \text{ in} : 4 \text{ mi} = 21 \text{ in} : x \)
Step 2 ：2. Cross-multiply: \( \frac{1}{4}x = 84 \)
Step 3 ：3. Solve for x: \( x = 336 \)
