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Finding the Fourth Proportional to 3,971.94, 5,481.02 and 2,479.76

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Solution

The fourth proportional to 3,971.94, 5,481.02 and 2,479.76 is: 3,421.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.94 : 5,481.02 = 2,479.76 : x
  2. Step 2: Convert to fraction form
    3,971.94/5,481.02 = 2,479.76/x
  3. Step 3: Cross multiply
    3,971.94x = 5,481.02 × 2,479.76
  4. Step 4: Simplify right side
    3,971.94x = 13,591,630.39
  5. Step 5: Solve for x
    x = 13,591,630.39/3,971.94
  6. Step 6: Final answer
    x = 3,421.92

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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.