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Finding the Fourth Proportional to 723,081.11, 997,850.21 and 396,393.54

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Solution

The fourth proportional to 723,081.11, 997,850.21 and 396,393.54 is: 547,022.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,081.11 : 997,850.21 = 396,393.54 : x
  2. Step 2: Convert to fraction form
    723,081.11/997,850.21 = 396,393.54/x
  3. Step 3: Cross multiply
    723,081.11x = 997,850.21 × 396,393.54
  4. Step 4: Simplify right side
    723,081.11x = 395,541,375,149.68
  5. Step 5: Solve for x
    x = 395,541,375,149.68/723,081.11
  6. Step 6: Final answer
    x = 547,022.14

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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.