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Finding the Fourth Proportional to 721,079.42, 995,049.12 and 394,327.43

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Solution

The fourth proportional to 721,079.42, 995,049.12 and 394,327.43 is: 544,149.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,079.42 : 995,049.12 = 394,327.43 : x
  2. Step 2: Convert to fraction form
    721,079.42/995,049.12 = 394,327.43/x
  3. Step 3: Cross multiply
    721,079.42x = 995,049.12 × 394,327.43
  4. Step 4: Simplify right side
    721,079.42x = 392,375,165,682.21
  5. Step 5: Solve for x
    x = 392,375,165,682.21/721,079.42
  6. Step 6: Final answer
    x = 544,149.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.