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Finding the Fourth Proportional to 3,874.11, 5,811.30 and 1,241.69

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Solution

The fourth proportional to 3,874.11, 5,811.30 and 1,241.69 is: 1,862.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,874.11 : 5,811.30 = 1,241.69 : x
  2. Step 2: Convert to fraction form
    3,874.11/5,811.30 = 1,241.69/x
  3. Step 3: Cross multiply
    3,874.11x = 5,811.30 × 1,241.69
  4. Step 4: Simplify right side
    3,874.11x = 7,215,833.10
  5. Step 5: Solve for x
    x = 7,215,833.10/3,874.11
  6. Step 6: Final answer
    x = 1,862.58

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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.