Home / 721,120.62-995,060.15-398,786.94

Finding the Fourth Proportional to 721,120.62, 995,060.15 and 398,786.94

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Solution

The fourth proportional to 721,120.62, 995,060.15 and 398,786.94 is: 550,278.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,120.62 : 995,060.15 = 398,786.94 : x
  2. Step 2: Convert to fraction form
    721,120.62/995,060.15 = 398,786.94/x
  3. Step 3: Cross multiply
    721,120.62x = 995,060.15 × 398,786.94
  4. Step 4: Simplify right side
    721,120.62x = 396,816,992,334.44
  5. Step 5: Solve for x
    x = 396,816,992,334.44/721,120.62
  6. Step 6: Final answer
    x = 550,278.25

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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.