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Finding the Fourth Proportional to 381,634.60, 572,451.90 and 132,341.80

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Solution

The fourth proportional to 381,634.60, 572,451.90 and 132,341.80 is: 198,512.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,634.60 : 572,451.90 = 132,341.80 : x
  2. Step 2: Convert to fraction form
    381,634.60/572,451.90 = 132,341.80/x
  3. Step 3: Cross multiply
    381,634.60x = 572,451.90 × 132,341.80
  4. Step 4: Simplify right side
    381,634.60x = 75,759,314,859.42
  5. Step 5: Solve for x
    x = 75,759,314,859.42/381,634.60
  6. Step 6: Final answer
    x = 198,512.70

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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.