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Finding the Fourth Proportional to 502.38, 693.96 and 393.24

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Solution

The fourth proportional to 502.38, 693.96 and 393.24 is: 543.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.38 : 693.96 = 393.24 : x
  2. Step 2: Convert to fraction form
    502.38/693.96 = 393.24/x
  3. Step 3: Cross multiply
    502.38x = 693.96 × 393.24
  4. Step 4: Simplify right side
    502.38x = 272,892.83
  5. Step 5: Solve for x
    x = 272,892.83/502.38
  6. Step 6: Final answer
    x = 543.20

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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.