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Finding the Fourth Proportional to 3,866.74, 5,791.91 and 2,479.21

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Solution

The fourth proportional to 3,866.74, 5,791.91 and 2,479.21 is: 3,713.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,866.74 : 5,791.91 = 2,479.21 : x
  2. Step 2: Convert to fraction form
    3,866.74/5,791.91 = 2,479.21/x
  3. Step 3: Cross multiply
    3,866.74x = 5,791.91 × 2,479.21
  4. Step 4: Simplify right side
    3,866.74x = 14,359,334.32
  5. Step 5: Solve for x
    x = 14,359,334.32/3,866.74
  6. Step 6: Final answer
    x = 3,713.55

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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.