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Finding the Fourth Proportional to 500.87, 691.25 and 314.50

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Solution

The fourth proportional to 500.87, 691.25 and 314.50 is: 434.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.87 : 691.25 = 314.50 : x
  2. Step 2: Convert to fraction form
    500.87/691.25 = 314.50/x
  3. Step 3: Cross multiply
    500.87x = 691.25 × 314.50
  4. Step 4: Simplify right side
    500.87x = 217,398.13
  5. Step 5: Solve for x
    x = 217,398.13/500.87
  6. Step 6: Final answer
    x = 434.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.