Home / 3,876.85-5,816.18-1,279.78

Finding the Fourth Proportional to 3,876.85, 5,816.18 and 1,279.78

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Solution

The fourth proportional to 3,876.85, 5,816.18 and 1,279.78 is: 1,919.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.85 : 5,816.18 = 1,279.78 : x
  2. Step 2: Convert to fraction form
    3,876.85/5,816.18 = 1,279.78/x
  3. Step 3: Cross multiply
    3,876.85x = 5,816.18 × 1,279.78
  4. Step 4: Simplify right side
    3,876.85x = 7,443,424.44
  5. Step 5: Solve for x
    x = 7,443,424.44/3,876.85
  6. Step 6: Final answer
    x = 1,919.97

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1.5x scale

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.