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Finding the Fourth Proportional to 3,874.33, 5,812.71 and 1,279.09

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Solution

The fourth proportional to 3,874.33, 5,812.71 and 1,279.09 is: 1,919.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,874.33 : 5,812.71 = 1,279.09 : x
  2. Step 2: Convert to fraction form
    3,874.33/5,812.71 = 1,279.09/x
  3. Step 3: Cross multiply
    3,874.33x = 5,812.71 × 1,279.09
  4. Step 4: Simplify right side
    3,874.33x = 7,434,979.23
  5. Step 5: Solve for x
    x = 7,434,979.23/3,874.33
  6. Step 6: Final answer
    x = 1,919.04

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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.