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Finding the Fourth Proportional to 3,956.58, 5,929.20 and 2,221.56

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Solution

The fourth proportional to 3,956.58, 5,929.20 and 2,221.56 is: 3,329.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,956.58 : 5,929.20 = 2,221.56 : x
  2. Step 2: Convert to fraction form
    3,956.58/5,929.20 = 2,221.56/x
  3. Step 3: Cross multiply
    3,956.58x = 5,929.20 × 2,221.56
  4. Step 4: Simplify right side
    3,956.58x = 13,172,073.55
  5. Step 5: Solve for x
    x = 13,172,073.55/3,956.58
  6. Step 6: Final answer
    x = 3,329.16

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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.