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Finding the Fourth Proportional to 3,995.20, 5,514 and 3,049.20

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Solution

The fourth proportional to 3,995.20, 5,514 and 3,049.20 is: 4,208.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,995.20 : 5,514 = 3,049.20 : x
  2. Step 2: Convert to fraction form
    3,995.20/5,514 = 3,049.20/x
  3. Step 3: Cross multiply
    3,995.20x = 5,514 × 3,049.20
  4. Step 4: Simplify right side
    3,995.20x = 16,813,288.80
  5. Step 5: Solve for x
    x = 16,813,288.80/3,995.20
  6. Step 6: Final answer
    x = 4,208.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.