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Finding the Fourth Proportional to 391,876.88, 587,981.72 and 214,176.24

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Solution

The fourth proportional to 391,876.88, 587,981.72 and 214,176.24 is: 321,355.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,876.88 : 587,981.72 = 214,176.24 : x
  2. Step 2: Convert to fraction form
    391,876.88/587,981.72 = 214,176.24/x
  3. Step 3: Cross multiply
    391,876.88x = 587,981.72 × 214,176.24
  4. Step 4: Simplify right side
    391,876.88x = 125,931,713,978.33
  5. Step 5: Solve for x
    x = 125,931,713,978.33/391,876.88
  6. Step 6: Final answer
    x = 321,355.30

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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.