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Finding the Fourth Proportional to 3,902.80, 5,857.16 and 1,439.96

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Solution

The fourth proportional to 3,902.80, 5,857.16 and 1,439.96 is: 2,161.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.80 : 5,857.16 = 1,439.96 : x
  2. Step 2: Convert to fraction form
    3,902.80/5,857.16 = 1,439.96/x
  3. Step 3: Cross multiply
    3,902.80x = 5,857.16 × 1,439.96
  4. Step 4: Simplify right side
    3,902.80x = 8,434,076.11
  5. Step 5: Solve for x
    x = 8,434,076.11/3,902.80
  6. Step 6: Final answer
    x = 2,161.03

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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.