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Finding the Fourth Proportional to 2,605.97, 3,906.57 and 961.26

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Solution

The fourth proportional to 2,605.97, 3,906.57 and 961.26 is: 1,441.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.97 : 3,906.57 = 961.26 : x
  2. Step 2: Convert to fraction form
    2,605.97/3,906.57 = 961.26/x
  3. Step 3: Cross multiply
    2,605.97x = 3,906.57 × 961.26
  4. Step 4: Simplify right side
    2,605.97x = 3,755,229.48
  5. Step 5: Solve for x
    x = 3,755,229.48/2,605.97
  6. Step 6: Final answer
    x = 1,441.01

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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.