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Finding the Fourth Proportional to 721,069.92, 995,046.36 and 394,377.72

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Solution

The fourth proportional to 721,069.92, 995,046.36 and 394,377.72 is: 544,224.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,069.92 : 995,046.36 = 394,377.72 : x
  2. Step 2: Convert to fraction form
    721,069.92/995,046.36 = 394,377.72/x
  3. Step 3: Cross multiply
    721,069.92x = 995,046.36 × 394,377.72
  4. Step 4: Simplify right side
    721,069.92x = 392,424,114,751.10
  5. Step 5: Solve for x
    x = 392,424,114,751.10/721,069.92
  6. Step 6: Final answer
    x = 544,224.77

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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.