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Finding the Fourth Proportional to 3,620.88, 5,421.78 and 2,914.27

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Solution

The fourth proportional to 3,620.88, 5,421.78 and 2,914.27 is: 4,363.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.88 : 5,421.78 = 2,914.27 : x
  2. Step 2: Convert to fraction form
    3,620.88/5,421.78 = 2,914.27/x
  3. Step 3: Cross multiply
    3,620.88x = 5,421.78 × 2,914.27
  4. Step 4: Simplify right side
    3,620.88x = 15,800,517.25
  5. Step 5: Solve for x
    x = 15,800,517.25/3,620.88
  6. Step 6: Final answer
    x = 4,363.72

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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.