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Finding the Fourth Proportional to 447,712.70, 671,569.05 and 398,723.90

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Solution

The fourth proportional to 447,712.70, 671,569.05 and 398,723.90 is: 598,085.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,712.70 : 671,569.05 = 398,723.90 : x
  2. Step 2: Convert to fraction form
    447,712.70/671,569.05 = 398,723.90/x
  3. Step 3: Cross multiply
    447,712.70x = 671,569.05 × 398,723.90
  4. Step 4: Simplify right side
    447,712.70x = 267,770,630,735.30
  5. Step 5: Solve for x
    x = 267,770,630,735.30/447,712.70
  6. Step 6: Final answer
    x = 598,085.85

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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.