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Finding the Fourth Proportional to 721,102.36, 995,081 and 394,350.88

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Solution

The fourth proportional to 721,102.36, 995,081 and 394,350.88 is: 544,182.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,102.36 : 995,081 = 394,350.88 : x
  2. Step 2: Convert to fraction form
    721,102.36/995,081 = 394,350.88/x
  3. Step 3: Cross multiply
    721,102.36x = 995,081 × 394,350.88
  4. Step 4: Simplify right side
    721,102.36x = 392,411,068,021.28
  5. Step 5: Solve for x
    x = 392,411,068,021.28/721,102.36
  6. Step 6: Final answer
    x = 544,182.20

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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.