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Finding the Fourth Proportional to 512,791.38, 769,187.66 and 133,711.78

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Solution

The fourth proportional to 512,791.38, 769,187.66 and 133,711.78 is: 200,567.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,791.38 : 769,187.66 = 133,711.78 : x
  2. Step 2: Convert to fraction form
    512,791.38/769,187.66 = 133,711.78/x
  3. Step 3: Cross multiply
    512,791.38x = 769,187.66 × 133,711.78
  4. Step 4: Simplify right side
    512,791.38x = 102,849,451,172.64
  5. Step 5: Solve for x
    x = 102,849,451,172.64/512,791.38
  6. Step 6: Final answer
    x = 200,567.82

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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.