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Finding the Fourth Proportional to 721,104.40, 995,083.68 and 394,352.92

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Solution

The fourth proportional to 721,104.40, 995,083.68 and 394,352.92 is: 544,184.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,104.40 : 995,083.68 = 394,352.92 : x
  2. Step 2: Convert to fraction form
    721,104.40/995,083.68 = 394,352.92/x
  3. Step 3: Cross multiply
    721,104.40x = 995,083.68 × 394,352.92
  4. Step 4: Simplify right side
    721,104.40x = 392,414,154,852.35
  5. Step 5: Solve for x
    x = 392,414,154,852.35/721,104.40
  6. Step 6: Final answer
    x = 544,184.94

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Double scale
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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.