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Finding the Fourth Proportional to 399,912.58, 551,885.92 and 238,781.71

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Solution

The fourth proportional to 399,912.58, 551,885.92 and 238,781.71 is: 329,522.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,912.58 : 551,885.92 = 238,781.71 : x
  2. Step 2: Convert to fraction form
    399,912.58/551,885.92 = 238,781.71/x
  3. Step 3: Cross multiply
    399,912.58x = 551,885.92 × 238,781.71
  4. Step 4: Simplify right side
    399,912.58x = 131,780,265,138.57
  5. Step 5: Solve for x
    x = 131,780,265,138.57/399,912.58
  6. Step 6: Final answer
    x = 329,522.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.