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Finding the Fourth Proportional to 492,781.20, 739,171.80 and 324,491.55

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Solution

The fourth proportional to 492,781.20, 739,171.80 and 324,491.55 is: 486,737.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,781.20 : 739,171.80 = 324,491.55 : x
  2. Step 2: Convert to fraction form
    492,781.20/739,171.80 = 324,491.55/x
  3. Step 3: Cross multiply
    492,781.20x = 739,171.80 × 324,491.55
  4. Step 4: Simplify right side
    492,781.20x = 239,855,003,098.29
  5. Step 5: Solve for x
    x = 239,855,003,098.29/492,781.20
  6. Step 6: Final answer
    x = 486,737.33

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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.