Home / 2,115.26-2,919.34-1,276.44

Finding the Fourth Proportional to 2,115.26, 2,919.34 and 1,276.44

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Solution

The fourth proportional to 2,115.26, 2,919.34 and 1,276.44 is: 1,761.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.26 : 2,919.34 = 1,276.44 : x
  2. Step 2: Convert to fraction form
    2,115.26/2,919.34 = 1,276.44/x
  3. Step 3: Cross multiply
    2,115.26x = 2,919.34 × 1,276.44
  4. Step 4: Simplify right side
    2,115.26x = 3,726,355.97
  5. Step 5: Solve for x
    x = 3,726,355.97/2,115.26
  6. Step 6: Final answer
    x = 1,761.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.