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Finding the Fourth Proportional to 3,208.72, 4,821.72 and 2,691.04

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Solution

The fourth proportional to 3,208.72, 4,821.72 and 2,691.04 is: 4,043.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,208.72 : 4,821.72 = 2,691.04 : x
  2. Step 2: Convert to fraction form
    3,208.72/4,821.72 = 2,691.04/x
  3. Step 3: Cross multiply
    3,208.72x = 4,821.72 × 2,691.04
  4. Step 4: Simplify right side
    3,208.72x = 12,975,441.39
  5. Step 5: Solve for x
    x = 12,975,441.39/3,208.72
  6. Step 6: Final answer
    x = 4,043.81

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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.