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Finding the Fourth Proportional to 260,876.80, 391,315.20 and 243,251.20

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Solution

The fourth proportional to 260,876.80, 391,315.20 and 243,251.20 is: 364,876.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,876.80 : 391,315.20 = 243,251.20 : x
  2. Step 2: Convert to fraction form
    260,876.80/391,315.20 = 243,251.20/x
  3. Step 3: Cross multiply
    260,876.80x = 391,315.20 × 243,251.20
  4. Step 4: Simplify right side
    260,876.80x = 95,187,891,978.24
  5. Step 5: Solve for x
    x = 95,187,891,978.24/260,876.80
  6. Step 6: Final answer
    x = 364,876.80

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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.