Home / 1,452.28-2,177.30-721.29

Finding the Fourth Proportional to 1,452.28, 2,177.30 and 721.29

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Solution

The fourth proportional to 1,452.28, 2,177.30 and 721.29 is: 1,081.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,452.28 : 2,177.30 = 721.29 : x
  2. Step 2: Convert to fraction form
    1,452.28/2,177.30 = 721.29/x
  3. Step 3: Cross multiply
    1,452.28x = 2,177.30 × 721.29
  4. Step 4: Simplify right side
    1,452.28x = 1,570,462.44
  5. Step 5: Solve for x
    x = 1,570,462.44/1,452.28
  6. Step 6: Final answer
    x = 1,081.38

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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.