Home / 2,020.35-3,031.11-721.92

Finding the Fourth Proportional to 2,020.35, 3,031.11 and 721.92

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Solution

The fourth proportional to 2,020.35, 3,031.11 and 721.92 is: 1,083.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,020.35 : 3,031.11 = 721.92 : x
  2. Step 2: Convert to fraction form
    2,020.35/3,031.11 = 721.92/x
  3. Step 3: Cross multiply
    2,020.35x = 3,031.11 × 721.92
  4. Step 4: Simplify right side
    2,020.35x = 2,188,218.93
  5. Step 5: Solve for x
    x = 2,188,218.93/2,020.35
  6. Step 6: Final answer
    x = 1,083.09

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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.