Finding the Fourth Proportional to 207.28, 285.99 and 129.70
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Solution
The fourth proportional to 207.28, 285.99 and 129.70 is: 178.95
Step by Step Solution
- Step 1: Write the proportion equation
207.28 : 285.99 = 129.70 : x - Step 2: Convert to fraction form
207.28/285.99 = 129.70/x - Step 3: Cross multiply
207.28x = 285.99 × 129.70 - Step 4: Simplify right side
207.28x = 37,092.90 - Step 5: Solve for x
x = 37,092.90/207.28 - Step 6: Final answer
x = 178.95
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.