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Finding the Fourth Proportional to 721,058.22, 995,066.91 and 398,790.54

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Solution

The fourth proportional to 721,058.22, 995,066.91 and 398,790.54 is: 550,334.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,058.22 : 995,066.91 = 398,790.54 : x
  2. Step 2: Convert to fraction form
    721,058.22/995,066.91 = 398,790.54/x
  3. Step 3: Cross multiply
    721,058.22x = 995,066.91 × 398,790.54
  4. Step 4: Simplify right side
    721,058.22x = 396,823,270,375.03
  5. Step 5: Solve for x
    x = 396,823,270,375.03/721,058.22
  6. Step 6: Final answer
    x = 550,334.58

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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.