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Finding the Fourth Proportional to 502.06, 753.12 and 319.24

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Solution

The fourth proportional to 502.06, 753.12 and 319.24 is: 478.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.06 : 753.12 = 319.24 : x
  2. Step 2: Convert to fraction form
    502.06/753.12 = 319.24/x
  3. Step 3: Cross multiply
    502.06x = 753.12 × 319.24
  4. Step 4: Simplify right side
    502.06x = 240,426.03
  5. Step 5: Solve for x
    x = 240,426.03/502.06
  6. Step 6: Final answer
    x = 478.88

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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.