Finding the Third Proportional to 208.50 and 399
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Solution
The third proportional to 208.50 and 399 is: 763.55
Step by Step Solution
- Step 1: Write the proportion equation
208.50 : 399 = 399 : x - Step 2: Convert to fraction form
208.50/399 = 399/x - Step 3: Cross multiply
208.50x = 399 × 399 - Step 4: Simplify right side
208.50x = 159,201 - Step 5: Solve for x
x = 159,201/208.50 - Step 6: Final answer
x = 763.55
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These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.