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Finding the Fourth Proportional to 1,279.68, 1,774.11 and 1,234.62

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Solution

The fourth proportional to 1,279.68, 1,774.11 and 1,234.62 is: 1,711.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.68 : 1,774.11 = 1,234.62 : x
  2. Step 2: Convert to fraction form
    1,279.68/1,774.11 = 1,234.62/x
  3. Step 3: Cross multiply
    1,279.68x = 1,774.11 × 1,234.62
  4. Step 4: Simplify right side
    1,279.68x = 2,190,351.69
  5. Step 5: Solve for x
    x = 2,190,351.69/1,279.68
  6. Step 6: Final answer
    x = 1,711.64

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.