Home / 2,686.62-3,997.42-2,619.66

Finding the Fourth Proportional to 2,686.62, 3,997.42 and 2,619.66

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Solution

The fourth proportional to 2,686.62, 3,997.42 and 2,619.66 is: 3,897.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.62 : 3,997.42 = 2,619.66 : x
  2. Step 2: Convert to fraction form
    2,686.62/3,997.42 = 2,619.66/x
  3. Step 3: Cross multiply
    2,686.62x = 3,997.42 × 2,619.66
  4. Step 4: Simplify right side
    2,686.62x = 10,471,854.74
  5. Step 5: Solve for x
    x = 10,471,854.74/2,686.62
  6. Step 6: Final answer
    x = 3,897.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.