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Finding the Fourth Proportional to 3,959.45, 5,462.45 and 2,279.96

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Solution

The fourth proportional to 3,959.45, 5,462.45 and 2,279.96 is: 3,145.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.45 : 5,462.45 = 2,279.96 : x
  2. Step 2: Convert to fraction form
    3,959.45/5,462.45 = 2,279.96/x
  3. Step 3: Cross multiply
    3,959.45x = 5,462.45 × 2,279.96
  4. Step 4: Simplify right side
    3,959.45x = 12,454,145.89
  5. Step 5: Solve for x
    x = 12,454,145.89/3,959.45
  6. Step 6: Final answer
    x = 3,145.43

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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.