Home / 2,115.62-2,919.92-1,276.39

Finding the Fourth Proportional to 2,115.62, 2,919.92 and 1,276.39

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Solution

The fourth proportional to 2,115.62, 2,919.92 and 1,276.39 is: 1,761.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.62 : 2,919.92 = 1,276.39 : x
  2. Step 2: Convert to fraction form
    2,115.62/2,919.92 = 1,276.39/x
  3. Step 3: Cross multiply
    2,115.62x = 2,919.92 × 1,276.39
  4. Step 4: Simplify right side
    2,115.62x = 3,726,953.96
  5. Step 5: Solve for x
    x = 3,726,953.96/2,115.62
  6. Step 6: Final answer
    x = 1,761.64

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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.