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Finding the Fourth Proportional to 3,940.38, 5,914.21 and 1,993.94

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Solution

The fourth proportional to 3,940.38, 5,914.21 and 1,993.94 is: 2,992.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.38 : 5,914.21 = 1,993.94 : x
  2. Step 2: Convert to fraction form
    3,940.38/5,914.21 = 1,993.94/x
  3. Step 3: Cross multiply
    3,940.38x = 5,914.21 × 1,993.94
  4. Step 4: Simplify right side
    3,940.38x = 11,792,579.89
  5. Step 5: Solve for x
    x = 11,792,579.89/3,940.38
  6. Step 6: Final answer
    x = 2,992.75

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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.