Home / 2,107.25-3,161.06-720.66

Finding the Fourth Proportional to 2,107.25, 3,161.06 and 720.66

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Solution

The fourth proportional to 2,107.25, 3,161.06 and 720.66 is: 1,081.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.25 : 3,161.06 = 720.66 : x
  2. Step 2: Convert to fraction form
    2,107.25/3,161.06 = 720.66/x
  3. Step 3: Cross multiply
    2,107.25x = 3,161.06 × 720.66
  4. Step 4: Simplify right side
    2,107.25x = 2,278,049.50
  5. Step 5: Solve for x
    x = 2,278,049.50/2,107.25
  6. Step 6: Final answer
    x = 1,081.05

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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.