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Finding the Fourth Proportional to 3,947.91, 5,920.38 and 1,448.28

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Solution

The fourth proportional to 3,947.91, 5,920.38 and 1,448.28 is: 2,171.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.91 : 5,920.38 = 1,448.28 : x
  2. Step 2: Convert to fraction form
    3,947.91/5,920.38 = 1,448.28/x
  3. Step 3: Cross multiply
    3,947.91x = 5,920.38 × 1,448.28
  4. Step 4: Simplify right side
    3,947.91x = 8,574,367.95
  5. Step 5: Solve for x
    x = 8,574,367.95/3,947.91
  6. Step 6: Final answer
    x = 2,171.88

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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.