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Finding the Fourth Proportional to 664,039.80, 995,930.10 and 220,807.80

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Solution

The fourth proportional to 664,039.80, 995,930.10 and 220,807.80 is: 331,168.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,039.80 : 995,930.10 = 220,807.80 : x
  2. Step 2: Convert to fraction form
    664,039.80/995,930.10 = 220,807.80/x
  3. Step 3: Cross multiply
    664,039.80x = 995,930.10 × 220,807.80
  4. Step 4: Simplify right side
    664,039.80x = 219,909,134,334.78
  5. Step 5: Solve for x
    x = 219,909,134,334.78/664,039.80
  6. Step 6: Final answer
    x = 331,168.61

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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.