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Finding the Fourth Proportional to 531.39, 732.87 and 356.70

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Solution

The fourth proportional to 531.39, 732.87 and 356.70 is: 491.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.39 : 732.87 = 356.70 : x
  2. Step 2: Convert to fraction form
    531.39/732.87 = 356.70/x
  3. Step 3: Cross multiply
    531.39x = 732.87 × 356.70
  4. Step 4: Simplify right side
    531.39x = 261,414.73
  5. Step 5: Solve for x
    x = 261,414.73/531.39
  6. Step 6: Final answer
    x = 491.95

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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.