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Finding the Fourth Proportional to 1,786.74, 2,680.11 and 1,174.32

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Solution

The fourth proportional to 1,786.74, 2,680.11 and 1,174.32 is: 1,761.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.74 : 2,680.11 = 1,174.32 : x
  2. Step 2: Convert to fraction form
    1,786.74/2,680.11 = 1,174.32/x
  3. Step 3: Cross multiply
    1,786.74x = 2,680.11 × 1,174.32
  4. Step 4: Simplify right side
    1,786.74x = 3,147,306.78
  5. Step 5: Solve for x
    x = 3,147,306.78/1,786.74
  6. Step 6: Final answer
    x = 1,761.48

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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.