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Finding the Fourth Proportional to 391,679.54, 587,553.47 and 111,196.79

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Solution

The fourth proportional to 391,679.54, 587,553.47 and 111,196.79 is: 166,804.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,679.54 : 587,553.47 = 111,196.79 : x
  2. Step 2: Convert to fraction form
    391,679.54/587,553.47 = 111,196.79/x
  3. Step 3: Cross multiply
    391,679.54x = 587,553.47 × 111,196.79
  4. Step 4: Simplify right side
    391,679.54x = 65,334,056,323.61
  5. Step 5: Solve for x
    x = 65,334,056,323.61/391,679.54
  6. Step 6: Final answer
    x = 166,804.88

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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.