Home / 820,872.70-1,231,309.05-442,959.10

Finding the Fourth Proportional to 820,872.70, 1,231,309.05 and 442,959.10

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Solution

The fourth proportional to 820,872.70, 1,231,309.05 and 442,959.10 is: 664,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,872.70 : 1,231,309.05 = 442,959.10 : x
  2. Step 2: Convert to fraction form
    820,872.70/1,231,309.05 = 442,959.10/x
  3. Step 3: Cross multiply
    820,872.70x = 1,231,309.05 × 442,959.10
  4. Step 4: Simplify right side
    820,872.70x = 545,419,548,609.86
  5. Step 5: Solve for x
    x = 545,419,548,609.86/820,872.70
  6. Step 6: Final answer
    x = 664,438.65

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Double scale
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Similar ratio
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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.