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Finding the Fourth Proportional to 3,960.72, 5,936.80 and 1,766.44

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Solution

The fourth proportional to 3,960.72, 5,936.80 and 1,766.44 is: 2,647.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.72 : 5,936.80 = 1,766.44 : x
  2. Step 2: Convert to fraction form
    3,960.72/5,936.80 = 1,766.44/x
  3. Step 3: Cross multiply
    3,960.72x = 5,936.80 × 1,766.44
  4. Step 4: Simplify right side
    3,960.72x = 10,487,000.99
  5. Step 5: Solve for x
    x = 10,487,000.99/3,960.72
  6. Step 6: Final answer
    x = 2,647.75

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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.