Home / 2,072.14-3,107.25-685.22

Finding the Fourth Proportional to 2,072.14, 3,107.25 and 685.22

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Solution

The fourth proportional to 2,072.14, 3,107.25 and 685.22 is: 1,027.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.14 : 3,107.25 = 685.22 : x
  2. Step 2: Convert to fraction form
    2,072.14/3,107.25 = 685.22/x
  3. Step 3: Cross multiply
    2,072.14x = 3,107.25 × 685.22
  4. Step 4: Simplify right side
    2,072.14x = 2,129,149.85
  5. Step 5: Solve for x
    x = 2,129,149.85/2,072.14
  6. Step 6: Final answer
    x = 1,027.51

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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.