Home / 2,112.85-3,170.21-727.18

Finding the Fourth Proportional to 2,112.85, 3,170.21 and 727.18

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Solution

The fourth proportional to 2,112.85, 3,170.21 and 727.18 is: 1,091.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.85 : 3,170.21 = 727.18 : x
  2. Step 2: Convert to fraction form
    2,112.85/3,170.21 = 727.18/x
  3. Step 3: Cross multiply
    2,112.85x = 3,170.21 × 727.18
  4. Step 4: Simplify right side
    2,112.85x = 2,305,301.75
  5. Step 5: Solve for x
    x = 2,305,301.75/2,112.85
  6. Step 6: Final answer
    x = 1,091.09

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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.