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Finding the Fourth Proportional to 663,940.80, 995,781.60 and 220,708.80

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Solution

The fourth proportional to 663,940.80, 995,781.60 and 220,708.80 is: 331,020.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,940.80 : 995,781.60 = 220,708.80 : x
  2. Step 2: Convert to fraction form
    663,940.80/995,781.60 = 220,708.80/x
  3. Step 3: Cross multiply
    663,940.80x = 995,781.60 × 220,708.80
  4. Step 4: Simplify right side
    663,940.80x = 219,777,761,998.08
  5. Step 5: Solve for x
    x = 219,777,761,998.08/663,940.80
  6. Step 6: Final answer
    x = 331,020.12

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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.