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Finding the Fourth Proportional to 262,843.20, 394,005.60 and 129,614.40

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Solution

The fourth proportional to 262,843.20, 394,005.60 and 129,614.40 is: 194,293.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,843.20 : 394,005.60 = 129,614.40 : x
  2. Step 2: Convert to fraction form
    262,843.20/394,005.60 = 129,614.40/x
  3. Step 3: Cross multiply
    262,843.20x = 394,005.60 × 129,614.40
  4. Step 4: Simplify right side
    262,843.20x = 51,068,799,440.64
  5. Step 5: Solve for x
    x = 51,068,799,440.64/262,843.20
  6. Step 6: Final answer
    x = 194,293.78

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1.5x scale

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.