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Finding the Fourth Proportional to 721,093.16, 995,102.18 and 398,796.32

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Solution

The fourth proportional to 721,093.16, 995,102.18 and 398,796.32 is: 550,335.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,093.16 : 995,102.18 = 398,796.32 : x
  2. Step 2: Convert to fraction form
    721,093.16/995,102.18 = 398,796.32/x
  3. Step 3: Cross multiply
    721,093.16x = 995,102.18 × 398,796.32
  4. Step 4: Simplify right side
    721,093.16x = 396,843,087,407.98
  5. Step 5: Solve for x
    x = 396,843,087,407.98/721,093.16
  6. Step 6: Final answer
    x = 550,335.39

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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.