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Finding the Fourth Proportional to 3,960.96, 5,942.25 and 1,328.73

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Solution

The fourth proportional to 3,960.96, 5,942.25 and 1,328.73 is: 1,993.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.96 : 5,942.25 = 1,328.73 : x
  2. Step 2: Convert to fraction form
    3,960.96/5,942.25 = 1,328.73/x
  3. Step 3: Cross multiply
    3,960.96x = 5,942.25 × 1,328.73
  4. Step 4: Simplify right side
    3,960.96x = 7,895,645.84
  5. Step 5: Solve for x
    x = 7,895,645.84/3,960.96
  6. Step 6: Final answer
    x = 1,993.37

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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.