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Finding the Fourth Proportional to 2,098.62, 3,147.93 and 865.17

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Solution

The fourth proportional to 2,098.62, 3,147.93 and 865.17 is: 1,297.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,098.62 : 3,147.93 = 865.17 : x
  2. Step 2: Convert to fraction form
    2,098.62/3,147.93 = 865.17/x
  3. Step 3: Cross multiply
    2,098.62x = 3,147.93 × 865.17
  4. Step 4: Simplify right side
    2,098.62x = 2,723,494.60
  5. Step 5: Solve for x
    x = 2,723,494.60/2,098.62
  6. Step 6: Final answer
    x = 1,297.76

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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.