Home / 820,874.20-1,231,311.30-442,960.60

Finding the Fourth Proportional to 820,874.20, 1,231,311.30 and 442,960.60

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Solution

The fourth proportional to 820,874.20, 1,231,311.30 and 442,960.60 is: 664,440.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,874.20 : 1,231,311.30 = 442,960.60 : x
  2. Step 2: Convert to fraction form
    820,874.20/1,231,311.30 = 442,960.60/x
  3. Step 3: Cross multiply
    820,874.20x = 1,231,311.30 × 442,960.60
  4. Step 4: Simplify right side
    820,874.20x = 545,422,392,234.78
  5. Step 5: Solve for x
    x = 545,422,392,234.78/820,874.20
  6. Step 6: Final answer
    x = 664,440.90

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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.