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Finding the Fourth Proportional to 3,764.42, 5,644.85 and 1,391.73

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Solution

The fourth proportional to 3,764.42, 5,644.85 and 1,391.73 is: 2,086.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,764.42 : 5,644.85 = 1,391.73 : x
  2. Step 2: Convert to fraction form
    3,764.42/5,644.85 = 1,391.73/x
  3. Step 3: Cross multiply
    3,764.42x = 5,644.85 × 1,391.73
  4. Step 4: Simplify right side
    3,764.42x = 7,856,120.50
  5. Step 5: Solve for x
    x = 7,856,120.50/3,764.42
  6. Step 6: Final answer
    x = 2,086.94

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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.