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Finding the Fourth Proportional to 3,957.86, 5,462.14 and 2,279.48

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Solution

The fourth proportional to 3,957.86, 5,462.14 and 2,279.48 is: 3,145.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,957.86 : 5,462.14 = 2,279.48 : x
  2. Step 2: Convert to fraction form
    3,957.86/5,462.14 = 2,279.48/x
  3. Step 3: Cross multiply
    3,957.86x = 5,462.14 × 2,279.48
  4. Step 4: Simplify right side
    3,957.86x = 12,450,838.89
  5. Step 5: Solve for x
    x = 12,450,838.89/3,957.86
  6. Step 6: Final answer
    x = 3,145.85

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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.