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Finding the Fourth Proportional to 391,240.08, 587,078.17 and 211,321.87

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Solution

The fourth proportional to 391,240.08, 587,078.17 and 211,321.87 is: 317,100.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,240.08 : 587,078.17 = 211,321.87 : x
  2. Step 2: Convert to fraction form
    391,240.08/587,078.17 = 211,321.87/x
  3. Step 3: Cross multiply
    391,240.08x = 587,078.17 × 211,321.87
  4. Step 4: Simplify right side
    391,240.08x = 124,062,456,926.12
  5. Step 5: Solve for x
    x = 124,062,456,926.12/391,240.08
  6. Step 6: Final answer
    x = 317,100.58

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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.