Home / 721,260.96-995,331.60-398,945.76

Finding the Fourth Proportional to 721,260.96, 995,331.60 and 398,945.76

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Solution

The fourth proportional to 721,260.96, 995,331.60 and 398,945.76 is: 550,540.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,260.96 : 995,331.60 = 398,945.76 : x
  2. Step 2: Convert to fraction form
    721,260.96/995,331.60 = 398,945.76/x
  3. Step 3: Cross multiply
    721,260.96x = 995,331.60 × 398,945.76
  4. Step 4: Simplify right side
    721,260.96x = 397,083,321,614.02
  5. Step 5: Solve for x
    x = 397,083,321,614.02/721,260.96
  6. Step 6: Final answer
    x = 550,540.43

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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.