Home / 2,181.62-3,272.70-721.28

Finding the Fourth Proportional to 2,181.62, 3,272.70 and 721.28

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Solution

The fourth proportional to 2,181.62, 3,272.70 and 721.28 is: 1,082.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.62 : 3,272.70 = 721.28 : x
  2. Step 2: Convert to fraction form
    2,181.62/3,272.70 = 721.28/x
  3. Step 3: Cross multiply
    2,181.62x = 3,272.70 × 721.28
  4. Step 4: Simplify right side
    2,181.62x = 2,360,533.06
  5. Step 5: Solve for x
    x = 2,360,533.06/2,181.62
  6. Step 6: Final answer
    x = 1,082.01

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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.