Finding the Fourth Proportional to 207.15, 310.92 and 99
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Solution
The fourth proportional to 207.15, 310.92 and 99 is: 148.59
Step by Step Solution
- Step 1: Write the proportion equation
207.15 : 310.92 = 99 : x - Step 2: Convert to fraction form
207.15/310.92 = 99/x - Step 3: Cross multiply
207.15x = 310.92 × 99 - Step 4: Simplify right side
207.15x = 30,781.08 - Step 5: Solve for x
x = 30,781.08/207.15 - Step 6: Final answer
x = 148.59
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.