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Finding the Fourth Proportional to 392,658.13, 588,912.63 and 108,278.38

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Solution

The fourth proportional to 392,658.13, 588,912.63 and 108,278.38 is: 162,397.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,658.13 : 588,912.63 = 108,278.38 : x
  2. Step 2: Convert to fraction form
    392,658.13/588,912.63 = 108,278.38/x
  3. Step 3: Cross multiply
    392,658.13x = 588,912.63 × 108,278.38
  4. Step 4: Simplify right side
    392,658.13x = 63,766,505,537.94
  5. Step 5: Solve for x
    x = 63,766,505,537.94/392,658.13
  6. Step 6: Final answer
    x = 162,397.01

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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.