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Finding the Fourth Proportional to 502.40, 753.96 and 213.92

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Solution

The fourth proportional to 502.40, 753.96 and 213.92 is: 321.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.40 : 753.96 = 213.92 : x
  2. Step 2: Convert to fraction form
    502.40/753.96 = 213.92/x
  3. Step 3: Cross multiply
    502.40x = 753.96 × 213.92
  4. Step 4: Simplify right side
    502.40x = 161,287.12
  5. Step 5: Solve for x
    x = 161,287.12/502.40
  6. Step 6: Final answer
    x = 321.03

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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.