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Finding the Fourth Proportional to 391,843.18, 587,820.12 and 125,541.40

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Solution

The fourth proportional to 391,843.18, 587,820.12 and 125,541.40 is: 188,329.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,843.18 : 587,820.12 = 125,541.40 : x
  2. Step 2: Convert to fraction form
    391,843.18/587,820.12 = 125,541.40/x
  3. Step 3: Cross multiply
    391,843.18x = 587,820.12 × 125,541.40
  4. Step 4: Simplify right side
    391,843.18x = 73,795,760,812.97
  5. Step 5: Solve for x
    x = 73,795,760,812.97/391,843.18
  6. Step 6: Final answer
    x = 188,329.83

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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.