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Finding the Fourth Proportional to 3,912.43, 5,399.02 and 2,143.99

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Solution

The fourth proportional to 3,912.43, 5,399.02 and 2,143.99 is: 2,958.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.43 : 5,399.02 = 2,143.99 : x
  2. Step 2: Convert to fraction form
    3,912.43/5,399.02 = 2,143.99/x
  3. Step 3: Cross multiply
    3,912.43x = 5,399.02 × 2,143.99
  4. Step 4: Simplify right side
    3,912.43x = 11,575,434.17
  5. Step 5: Solve for x
    x = 11,575,434.17/3,912.43
  6. Step 6: Final answer
    x = 2,958.63

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.