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Finding the Fourth Proportional to 443,411.60, 665,215.68 and 127,843.88

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Solution

The fourth proportional to 443,411.60, 665,215.68 and 127,843.88 is: 191,794.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,411.60 : 665,215.68 = 127,843.88 : x
  2. Step 2: Convert to fraction form
    443,411.60/665,215.68 = 127,843.88/x
  3. Step 3: Cross multiply
    443,411.60x = 665,215.68 × 127,843.88
  4. Step 4: Simplify right side
    443,411.60x = 85,043,753,568.04
  5. Step 5: Solve for x
    x = 85,043,753,568.04/443,411.60
  6. Step 6: Final answer
    x = 191,794.16

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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.