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Finding the Fourth Proportional to 502.38, 753.42 and 213.75

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Solution

The fourth proportional to 502.38, 753.42 and 213.75 is: 320.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.38 : 753.42 = 213.75 : x
  2. Step 2: Convert to fraction form
    502.38/753.42 = 213.75/x
  3. Step 3: Cross multiply
    502.38x = 753.42 × 213.75
  4. Step 4: Simplify right side
    502.38x = 161,043.53
  5. Step 5: Solve for x
    x = 161,043.53/502.38
  6. Step 6: Final answer
    x = 320.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.