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Finding the Fourth Proportional to 392,910.60, 588,491.10 and 340,422.60

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Solution

The fourth proportional to 392,910.60, 588,491.10 and 340,422.60 is: 509,875.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,910.60 : 588,491.10 = 340,422.60 : x
  2. Step 2: Convert to fraction form
    392,910.60/588,491.10 = 340,422.60/x
  3. Step 3: Cross multiply
    392,910.60x = 588,491.10 × 340,422.60
  4. Step 4: Simplify right side
    392,910.60x = 200,335,670,338.86
  5. Step 5: Solve for x
    x = 200,335,670,338.86/392,910.60
  6. Step 6: Final answer
    x = 509,875.96

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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.