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Finding the Fourth Proportional to 643,729.92, 888,141.98 and 371,761.90

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Solution

The fourth proportional to 643,729.92, 888,141.98 and 371,761.90 is: 512,912.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,729.92 : 888,141.98 = 371,761.90 : x
  2. Step 2: Convert to fraction form
    643,729.92/888,141.98 = 371,761.90/x
  3. Step 3: Cross multiply
    643,729.92x = 888,141.98 × 371,761.90
  4. Step 4: Simplify right side
    643,729.92x = 330,177,349,954.56
  5. Step 5: Solve for x
    x = 330,177,349,954.56/643,729.92
  6. Step 6: Final answer
    x = 512,912.85

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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.