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Finding the Fourth Proportional to 391,871.86, 587,974.22 and 214,171.26

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Solution

The fourth proportional to 391,871.86, 587,974.22 and 214,171.26 is: 321,347.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,871.86 : 587,974.22 = 214,171.26 : x
  2. Step 2: Convert to fraction form
    391,871.86/587,974.22 = 214,171.26/x
  3. Step 3: Cross multiply
    391,871.86x = 587,974.22 × 214,171.26
  4. Step 4: Simplify right side
    391,871.86x = 125,927,179,544.92
  5. Step 5: Solve for x
    x = 125,927,179,544.92/391,871.86
  6. Step 6: Final answer
    x = 321,347.85

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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.