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Finding the Fourth Proportional to 502.39, 755.12 and 491.62

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Solution

The fourth proportional to 502.39, 755.12 and 491.62 is: 738.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.39 : 755.12 = 491.62 : x
  2. Step 2: Convert to fraction form
    502.39/755.12 = 491.62/x
  3. Step 3: Cross multiply
    502.39x = 755.12 × 491.62
  4. Step 4: Simplify right side
    502.39x = 371,229.64
  5. Step 5: Solve for x
    x = 371,229.64/502.39
  6. Step 6: Final answer
    x = 738.93

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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.