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Finding the Fourth Proportional to 392,500.80, 588,751.20 and 143,150.40

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Solution

The fourth proportional to 392,500.80, 588,751.20 and 143,150.40 is: 214,725.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,500.80 : 588,751.20 = 143,150.40 : x
  2. Step 2: Convert to fraction form
    392,500.80/588,751.20 = 143,150.40/x
  3. Step 3: Cross multiply
    392,500.80x = 588,751.20 × 143,150.40
  4. Step 4: Simplify right side
    392,500.80x = 84,279,969,780.48
  5. Step 5: Solve for x
    x = 84,279,969,780.48/392,500.80
  6. Step 6: Final answer
    x = 214,725.60

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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.