Home / 3,876.34-5,815.43-1,279.28

Finding the Fourth Proportional to 3,876.34, 5,815.43 and 1,279.28

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Solution

The fourth proportional to 3,876.34, 5,815.43 and 1,279.28 is: 1,919.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.34 : 5,815.43 = 1,279.28 : x
  2. Step 2: Convert to fraction form
    3,876.34/5,815.43 = 1,279.28/x
  3. Step 3: Cross multiply
    3,876.34x = 5,815.43 × 1,279.28
  4. Step 4: Simplify right side
    3,876.34x = 7,439,563.29
  5. Step 5: Solve for x
    x = 7,439,563.29/3,876.34
  6. Step 6: Final answer
    x = 1,919.22

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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.