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Finding the Fourth Proportional to 3,786.78, 5,680.24 and 1,447.87

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Solution

The fourth proportional to 3,786.78, 5,680.24 and 1,447.87 is: 2,171.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.78 : 5,680.24 = 1,447.87 : x
  2. Step 2: Convert to fraction form
    3,786.78/5,680.24 = 1,447.87/x
  3. Step 3: Cross multiply
    3,786.78x = 5,680.24 × 1,447.87
  4. Step 4: Simplify right side
    3,786.78x = 8,224,241.85
  5. Step 5: Solve for x
    x = 8,224,241.85/3,786.78
  6. Step 6: Final answer
    x = 2,171.83

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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.