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Finding the Fourth Proportional to 639,163.66, 882,365.19 and 397,524.13

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Solution

The fourth proportional to 639,163.66, 882,365.19 and 397,524.13 is: 548,781.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,163.66 : 882,365.19 = 397,524.13 : x
  2. Step 2: Convert to fraction form
    639,163.66/882,365.19 = 397,524.13/x
  3. Step 3: Cross multiply
    639,163.66x = 882,365.19 × 397,524.13
  4. Step 4: Simplify right side
    639,163.66x = 350,761,454,497.04
  5. Step 5: Solve for x
    x = 350,761,454,497.04/639,163.66
  6. Step 6: Final answer
    x = 548,781.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.