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Finding the Fourth Proportional to 399,738.60, 551,462.07 and 238,499.90

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Solution

The fourth proportional to 399,738.60, 551,462.07 and 238,499.90 is: 329,024.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,738.60 : 551,462.07 = 238,499.90 : x
  2. Step 2: Convert to fraction form
    399,738.60/551,462.07 = 238,499.90/x
  3. Step 3: Cross multiply
    399,738.60x = 551,462.07 × 238,499.90
  4. Step 4: Simplify right side
    399,738.60x = 131,523,645,791.48
  5. Step 5: Solve for x
    x = 131,523,645,791.48/399,738.60
  6. Step 6: Final answer
    x = 329,024.13

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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.