Home / 2,108.26-3,162.76-721.27

Finding the Fourth Proportional to 2,108.26, 3,162.76 and 721.27

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Solution

The fourth proportional to 2,108.26, 3,162.76 and 721.27 is: 1,082.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.26 : 3,162.76 = 721.27 : x
  2. Step 2: Convert to fraction form
    2,108.26/3,162.76 = 721.27/x
  3. Step 3: Cross multiply
    2,108.26x = 3,162.76 × 721.27
  4. Step 4: Simplify right side
    2,108.26x = 2,281,203.91
  5. Step 5: Solve for x
    x = 2,281,203.91/2,108.26
  6. Step 6: Final answer
    x = 1,082.03

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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.