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Finding the Fourth Proportional to 392,717.80, 588,687.90 and 192,874.60

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Solution

The fourth proportional to 392,717.80, 588,687.90 and 192,874.60 is: 289,120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,717.80 : 588,687.90 = 192,874.60 : x
  2. Step 2: Convert to fraction form
    392,717.80/588,687.90 = 192,874.60/x
  3. Step 3: Cross multiply
    392,717.80x = 588,687.90 × 192,874.60
  4. Step 4: Simplify right side
    392,717.80x = 113,542,943,237.34
  5. Step 5: Solve for x
    x = 113,542,943,237.34/392,717.80
  6. Step 6: Final answer
    x = 289,120.95

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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.