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Finding the Fourth Proportional to 2,098.26, 3,147.39 and 864.90

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Solution

The fourth proportional to 2,098.26, 3,147.39 and 864.90 is: 1,297.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,098.26 : 3,147.39 = 864.90 : x
  2. Step 2: Convert to fraction form
    2,098.26/3,147.39 = 864.90/x
  3. Step 3: Cross multiply
    2,098.26x = 3,147.39 × 864.90
  4. Step 4: Simplify right side
    2,098.26x = 2,722,177.61
  5. Step 5: Solve for x
    x = 2,722,177.61/2,098.26
  6. Step 6: Final answer
    x = 1,297.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.