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Finding the Fourth Proportional to 721,100.36, 995,078.24 and 394,348.88

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Solution

The fourth proportional to 721,100.36, 995,078.24 and 394,348.88 is: 544,179.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,100.36 : 995,078.24 = 394,348.88 : x
  2. Step 2: Convert to fraction form
    721,100.36/995,078.24 = 394,348.88/x
  3. Step 3: Cross multiply
    721,100.36x = 995,078.24 × 394,348.88
  4. Step 4: Simplify right side
    721,100.36x = 392,407,989,456.37
  5. Step 5: Solve for x
    x = 392,407,989,456.37/721,100.36
  6. Step 6: Final answer
    x = 544,179.44

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Double scale
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Similar ratio
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1.5x scale

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.