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Finding the Fourth Proportional to 721,090.16, 995,098.04 and 398,793.32

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Solution

The fourth proportional to 721,090.16, 995,098.04 and 398,793.32 is: 550,331.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,090.16 : 995,098.04 = 398,793.32 : x
  2. Step 2: Convert to fraction form
    721,090.16/995,098.04 = 398,793.32/x
  3. Step 3: Cross multiply
    721,090.16x = 995,098.04 × 398,793.32
  4. Step 4: Simplify right side
    721,090.16x = 396,838,449,103.13
  5. Step 5: Solve for x
    x = 396,838,449,103.13/721,090.16
  6. Step 6: Final answer
    x = 550,331.25

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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.