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Finding the Fourth Proportional to 1,694.23, 2,540.57 and 769.75

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Solution

The fourth proportional to 1,694.23, 2,540.57 and 769.75 is: 1,154.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,694.23 : 2,540.57 = 769.75 : x
  2. Step 2: Convert to fraction form
    1,694.23/2,540.57 = 769.75/x
  3. Step 3: Cross multiply
    1,694.23x = 2,540.57 × 769.75
  4. Step 4: Simplify right side
    1,694.23x = 1,955,603.76
  5. Step 5: Solve for x
    x = 1,955,603.76/1,694.23
  6. Step 6: Final answer
    x = 1,154.27

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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.