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Finding the Fourth Proportional to 260,886.80, 391,805.40 and 228,227.60

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Solution

The fourth proportional to 260,886.80, 391,805.40 and 228,227.60 is: 342,757.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,886.80 : 391,805.40 = 228,227.60 : x
  2. Step 2: Convert to fraction form
    260,886.80/391,805.40 = 228,227.60/x
  3. Step 3: Cross multiply
    260,886.80x = 391,805.40 × 228,227.60
  4. Step 4: Simplify right side
    260,886.80x = 89,420,806,109.04
  5. Step 5: Solve for x
    x = 89,420,806,109.04/260,886.80
  6. Step 6: Final answer
    x = 342,757.11

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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.