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Finding the Fourth Proportional to 587,617.47, 811,160.31 and 396,889.20

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Solution

The fourth proportional to 587,617.47, 811,160.31 and 396,889.20 is: 547,874.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,617.47 : 811,160.31 = 396,889.20 : x
  2. Step 2: Convert to fraction form
    587,617.47/811,160.31 = 396,889.20/x
  3. Step 3: Cross multiply
    587,617.47x = 811,160.31 × 396,889.20
  4. Step 4: Simplify right side
    587,617.47x = 321,940,766,507.65
  5. Step 5: Solve for x
    x = 321,940,766,507.65/587,617.47
  6. Step 6: Final answer
    x = 547,874.74

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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.