Home / 721,141.52-995,170.26-398,839.70

Finding the Fourth Proportional to 721,141.52, 995,170.26 and 398,839.70

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Solution

The fourth proportional to 721,141.52, 995,170.26 and 398,839.70 is: 550,396.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,141.52 : 995,170.26 = 398,839.70 : x
  2. Step 2: Convert to fraction form
    721,141.52/995,170.26 = 398,839.70/x
  3. Step 3: Cross multiply
    721,141.52x = 995,170.26 × 398,839.70
  4. Step 4: Simplify right side
    721,141.52x = 396,913,407,947.32
  5. Step 5: Solve for x
    x = 396,913,407,947.32/721,141.52
  6. Step 6: Final answer
    x = 550,396.00

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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.