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Finding the Fourth Proportional to 2,081.33, 3,122.49 and 694.68

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Solution

The fourth proportional to 2,081.33, 3,122.49 and 694.68 is: 1,042.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.33 : 3,122.49 = 694.68 : x
  2. Step 2: Convert to fraction form
    2,081.33/3,122.49 = 694.68/x
  3. Step 3: Cross multiply
    2,081.33x = 3,122.49 × 694.68
  4. Step 4: Simplify right side
    2,081.33x = 2,169,131.35
  5. Step 5: Solve for x
    x = 2,169,131.35/2,081.33
  6. Step 6: Final answer
    x = 1,042.19

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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.