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Finding the Fourth Proportional to 431,391.10, 647,086.65 and 274,315.90

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Solution

The fourth proportional to 431,391.10, 647,086.65 and 274,315.90 is: 411,473.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,391.10 : 647,086.65 = 274,315.90 : x
  2. Step 2: Convert to fraction form
    431,391.10/647,086.65 = 274,315.90/x
  3. Step 3: Cross multiply
    431,391.10x = 647,086.65 × 274,315.90
  4. Step 4: Simplify right side
    431,391.10x = 177,506,156,772.74
  5. Step 5: Solve for x
    x = 177,506,156,772.74/431,391.10
  6. Step 6: Final answer
    x = 411,473.85

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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.