Home / 2,181.33-3,272.60-721.51

Finding the Fourth Proportional to 2,181.33, 3,272.60 and 721.51

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Solution

The fourth proportional to 2,181.33, 3,272.60 and 721.51 is: 1,082.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.33 : 3,272.60 = 721.51 : x
  2. Step 2: Convert to fraction form
    2,181.33/3,272.60 = 721.51/x
  3. Step 3: Cross multiply
    2,181.33x = 3,272.60 × 721.51
  4. Step 4: Simplify right side
    2,181.33x = 2,361,207.25
  5. Step 5: Solve for x
    x = 2,361,207.25/2,181.33
  6. Step 6: Final answer
    x = 1,082.46

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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.