Home / 721,120.12-995,059.46-398,786.44

Finding the Fourth Proportional to 721,120.12, 995,059.46 and 398,786.44

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Solution

The fourth proportional to 721,120.12, 995,059.46 and 398,786.44 is: 550,277.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,120.12 : 995,059.46 = 398,786.44 : x
  2. Step 2: Convert to fraction form
    721,120.12/995,059.46 = 398,786.44/x
  3. Step 3: Cross multiply
    721,120.12x = 995,059.46 × 398,786.44
  4. Step 4: Simplify right side
    721,120.12x = 396,816,219,641.72
  5. Step 5: Solve for x
    x = 396,816,219,641.72/721,120.12
  6. Step 6: Final answer
    x = 550,277.56

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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.