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Finding the Fourth Proportional to 391,073.20, 584,860.20 and 328,087.60

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Solution

The fourth proportional to 391,073.20, 584,860.20 and 328,087.60 is: 490,663.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,073.20 : 584,860.20 = 328,087.60 : x
  2. Step 2: Convert to fraction form
    391,073.20/584,860.20 = 328,087.60/x
  3. Step 3: Cross multiply
    391,073.20x = 584,860.20 × 328,087.60
  4. Step 4: Simplify right side
    391,073.20x = 191,885,379,353.52
  5. Step 5: Solve for x
    x = 191,885,379,353.52/391,073.20
  6. Step 6: Final answer
    x = 490,663.59

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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.