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Finding the Fourth Proportional to 392,491.71, 588,363.84 and 126,065.41

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Solution

The fourth proportional to 392,491.71, 588,363.84 and 126,065.41 is: 188,978.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,491.71 : 588,363.84 = 126,065.41 : x
  2. Step 2: Convert to fraction form
    392,491.71/588,363.84 = 126,065.41/x
  3. Step 3: Cross multiply
    392,491.71x = 588,363.84 × 126,065.41
  4. Step 4: Simplify right side
    392,491.71x = 74,172,328,088.45
  5. Step 5: Solve for x
    x = 74,172,328,088.45/392,491.71
  6. Step 6: Final answer
    x = 188,978.08

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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.