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Finding the Fourth Proportional to 3,964.88, 5,947.02 and 1,191.57

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Solution

The fourth proportional to 3,964.88, 5,947.02 and 1,191.57 is: 1,787.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,964.88 : 5,947.02 = 1,191.57 : x
  2. Step 2: Convert to fraction form
    3,964.88/5,947.02 = 1,191.57/x
  3. Step 3: Cross multiply
    3,964.88x = 5,947.02 × 1,191.57
  4. Step 4: Simplify right side
    3,964.88x = 7,086,290.62
  5. Step 5: Solve for x
    x = 7,086,290.62/3,964.88
  6. Step 6: Final answer
    x = 1,787.27

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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.