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Finding the Fourth Proportional to 502.72, 691.68 and 440.32

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Solution

The fourth proportional to 502.72, 691.68 and 440.32 is: 605.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.72 : 691.68 = 440.32 : x
  2. Step 2: Convert to fraction form
    502.72/691.68 = 440.32/x
  3. Step 3: Cross multiply
    502.72x = 691.68 × 440.32
  4. Step 4: Simplify right side
    502.72x = 304,560.54
  5. Step 5: Solve for x
    x = 304,560.54/502.72
  6. Step 6: Final answer
    x = 605.83

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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.