Home / 2,181.24-3,272.13-721.35

Finding the Fourth Proportional to 2,181.24, 3,272.13 and 721.35

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Solution

The fourth proportional to 2,181.24, 3,272.13 and 721.35 is: 1,082.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.24 : 3,272.13 = 721.35 : x
  2. Step 2: Convert to fraction form
    2,181.24/3,272.13 = 721.35/x
  3. Step 3: Cross multiply
    2,181.24x = 3,272.13 × 721.35
  4. Step 4: Simplify right side
    2,181.24x = 2,360,350.98
  5. Step 5: Solve for x
    x = 2,360,350.98/2,181.24
  6. Step 6: Final answer
    x = 1,082.11

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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.