Home / 721,187.06-995,171.22-398,890.25

Finding the Fourth Proportional to 721,187.06, 995,171.22 and 398,890.25

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Solution

The fourth proportional to 721,187.06, 995,171.22 and 398,890.25 is: 550,431.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,187.06 : 995,171.22 = 398,890.25 : x
  2. Step 2: Convert to fraction form
    721,187.06/995,171.22 = 398,890.25/x
  3. Step 3: Cross multiply
    721,187.06x = 995,171.22 × 398,890.25
  4. Step 4: Simplify right side
    721,187.06x = 396,964,091,762.75
  5. Step 5: Solve for x
    x = 396,964,091,762.75/721,187.06
  6. Step 6: Final answer
    x = 550,431.53

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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.