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Finding the Fourth Proportional to 502.32, 752.80 and 319.39

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Solution

The fourth proportional to 502.32, 752.80 and 319.39 is: 478.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.32 : 752.80 = 319.39 : x
  2. Step 2: Convert to fraction form
    502.32/752.80 = 319.39/x
  3. Step 3: Cross multiply
    502.32x = 752.80 × 319.39
  4. Step 4: Simplify right side
    502.32x = 240,434.11
  5. Step 5: Solve for x
    x = 240,434.11/502.32
  6. Step 6: Final answer
    x = 478.65

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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.