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Finding the Fourth Proportional to 831,640.87, 1,147,658.83 and 469,067.68

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Solution

The fourth proportional to 831,640.87, 1,147,658.83 and 469,067.68 is: 647,310.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,640.87 : 1,147,658.83 = 469,067.68 : x
  2. Step 2: Convert to fraction form
    831,640.87/1,147,658.83 = 469,067.68/x
  3. Step 3: Cross multiply
    831,640.87x = 1,147,658.83 × 469,067.68
  4. Step 4: Simplify right side
    831,640.87x = 538,329,664,819.61
  5. Step 5: Solve for x
    x = 538,329,664,819.61/831,640.87
  6. Step 6: Final answer
    x = 647,310.26

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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.