Home / 2,115.82-2,919.36-1,276.66

Finding the Fourth Proportional to 2,115.82, 2,919.36 and 1,276.66

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Solution

The fourth proportional to 2,115.82, 2,919.36 and 1,276.66 is: 1,761.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.82 : 2,919.36 = 1,276.66 : x
  2. Step 2: Convert to fraction form
    2,115.82/2,919.36 = 1,276.66/x
  3. Step 3: Cross multiply
    2,115.82x = 2,919.36 × 1,276.66
  4. Step 4: Simplify right side
    2,115.82x = 3,727,030.14
  5. Step 5: Solve for x
    x = 3,727,030.14/2,115.82
  6. Step 6: Final answer
    x = 1,761.51

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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.