Home / 743,149.38-1,025,511.82-420,861.78

Finding the Fourth Proportional to 743,149.38, 1,025,511.82 and 420,861.78

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Solution

The fourth proportional to 743,149.38, 1,025,511.82 and 420,861.78 is: 580,769.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,149.38 : 1,025,511.82 = 420,861.78 : x
  2. Step 2: Convert to fraction form
    743,149.38/1,025,511.82 = 420,861.78/x
  3. Step 3: Cross multiply
    743,149.38x = 1,025,511.82 × 420,861.78
  4. Step 4: Simplify right side
    743,149.38x = 431,598,728,924.09
  5. Step 5: Solve for x
    x = 431,598,728,924.09/743,149.38
  6. Step 6: Final answer
    x = 580,769.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.