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Finding the Fourth Proportional to 392,761.80, 588,753.90 and 192,918.60

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Solution

The fourth proportional to 392,761.80, 588,753.90 and 192,918.60 is: 289,186.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,761.80 : 588,753.90 = 192,918.60 : x
  2. Step 2: Convert to fraction form
    392,761.80/588,753.90 = 192,918.60/x
  3. Step 3: Cross multiply
    392,761.80x = 588,753.90 × 192,918.60
  4. Step 4: Simplify right side
    392,761.80x = 113,581,578,132.54
  5. Step 5: Solve for x
    x = 113,581,578,132.54/392,761.80
  6. Step 6: Final answer
    x = 289,186.93

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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.