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Finding the Fourth Proportional to 3,861.76, 5,791.11 and 1,362.81

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Solution

The fourth proportional to 3,861.76, 5,791.11 and 1,362.81 is: 2,043.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.76 : 5,791.11 = 1,362.81 : x
  2. Step 2: Convert to fraction form
    3,861.76/5,791.11 = 1,362.81/x
  3. Step 3: Cross multiply
    3,861.76x = 5,791.11 × 1,362.81
  4. Step 4: Simplify right side
    3,861.76x = 7,892,182.62
  5. Step 5: Solve for x
    x = 7,892,182.62/3,861.76
  6. Step 6: Final answer
    x = 2,043.68

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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.