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Finding the Fourth Proportional to 3,879.64, 5,819.82 and 1,414.72

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Solution

The fourth proportional to 3,879.64, 5,819.82 and 1,414.72 is: 2,122.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.64 : 5,819.82 = 1,414.72 : x
  2. Step 2: Convert to fraction form
    3,879.64/5,819.82 = 1,414.72/x
  3. Step 3: Cross multiply
    3,879.64x = 5,819.82 × 1,414.72
  4. Step 4: Simplify right side
    3,879.64x = 8,233,415.75
  5. Step 5: Solve for x
    x = 8,233,415.75/3,879.64
  6. Step 6: Final answer
    x = 2,122.21

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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.