Home / 2,020.26-3,029.42-721.42

Finding the Fourth Proportional to 2,020.26, 3,029.42 and 721.42

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Solution

The fourth proportional to 2,020.26, 3,029.42 and 721.42 is: 1,081.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,020.26 : 3,029.42 = 721.42 : x
  2. Step 2: Convert to fraction form
    2,020.26/3,029.42 = 721.42/x
  3. Step 3: Cross multiply
    2,020.26x = 3,029.42 × 721.42
  4. Step 4: Simplify right side
    2,020.26x = 2,185,484.18
  5. Step 5: Solve for x
    x = 2,185,484.18/2,020.26
  6. Step 6: Final answer
    x = 1,081.78

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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.