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Finding the Fourth Proportional to 3,778.67, 5,668.02 and 1,279.88

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Solution

The fourth proportional to 3,778.67, 5,668.02 and 1,279.88 is: 1,919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,778.67 : 5,668.02 = 1,279.88 : x
  2. Step 2: Convert to fraction form
    3,778.67/5,668.02 = 1,279.88/x
  3. Step 3: Cross multiply
    3,778.67x = 5,668.02 × 1,279.88
  4. Step 4: Simplify right side
    3,778.67x = 7,254,385.44
  5. Step 5: Solve for x
    x = 7,254,385.44/3,778.67
  6. Step 6: Final answer
    x = 1,919.83

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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.