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Finding the Fourth Proportional to 641,329.87, 960,076.92 and 387,843.20

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Solution

The fourth proportional to 641,329.87, 960,076.92 and 387,843.20 is: 580,604.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,329.87 : 960,076.92 = 387,843.20 : x
  2. Step 2: Convert to fraction form
    641,329.87/960,076.92 = 387,843.20/x
  3. Step 3: Cross multiply
    641,329.87x = 960,076.92 × 387,843.20
  4. Step 4: Simplify right side
    641,329.87x = 372,359,307,299.14
  5. Step 5: Solve for x
    x = 372,359,307,299.14/641,329.87
  6. Step 6: Final answer
    x = 580,604.97

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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.