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Finding the Fourth Proportional to 3,871.62, 5,806.39 and 1,679.83

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Solution

The fourth proportional to 3,871.62, 5,806.39 and 1,679.83 is: 2,519.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.62 : 5,806.39 = 1,679.83 : x
  2. Step 2: Convert to fraction form
    3,871.62/5,806.39 = 1,679.83/x
  3. Step 3: Cross multiply
    3,871.62x = 5,806.39 × 1,679.83
  4. Step 4: Simplify right side
    3,871.62x = 9,753,739.71
  5. Step 5: Solve for x
    x = 9,753,739.71/3,871.62
  6. Step 6: Final answer
    x = 2,519.29

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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.