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Finding the Fourth Proportional to 392,578.22, 588,867.51 and 126,338.70

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Solution

The fourth proportional to 392,578.22, 588,867.51 and 126,338.70 is: 189,508.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,578.22 : 588,867.51 = 126,338.70 : x
  2. Step 2: Convert to fraction form
    392,578.22/588,867.51 = 126,338.70/x
  3. Step 3: Cross multiply
    392,578.22x = 588,867.51 × 126,338.70
  4. Step 4: Simplify right side
    392,578.22x = 74,396,755,685.64
  5. Step 5: Solve for x
    x = 74,396,755,685.64/392,578.22
  6. Step 6: Final answer
    x = 189,508.11

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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.