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Finding the Fourth Proportional to 439,793.20, 659,689.80 and 140,295.70

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Solution

The fourth proportional to 439,793.20, 659,689.80 and 140,295.70 is: 210,443.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,793.20 : 659,689.80 = 140,295.70 : x
  2. Step 2: Convert to fraction form
    439,793.20/659,689.80 = 140,295.70/x
  3. Step 3: Cross multiply
    439,793.20x = 659,689.80 × 140,295.70
  4. Step 4: Simplify right side
    439,793.20x = 92,551,642,273.86
  5. Step 5: Solve for x
    x = 92,551,642,273.86/439,793.20
  6. Step 6: Final answer
    x = 210,443.55

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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.