Home / 1,982.53-2,736.28-1,143.20

Finding the Fourth Proportional to 1,982.53, 2,736.28 and 1,143.20

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Solution

The fourth proportional to 1,982.53, 2,736.28 and 1,143.20 is: 1,577.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.53 : 2,736.28 = 1,143.20 : x
  2. Step 2: Convert to fraction form
    1,982.53/2,736.28 = 1,143.20/x
  3. Step 3: Cross multiply
    1,982.53x = 2,736.28 × 1,143.20
  4. Step 4: Simplify right side
    1,982.53x = 3,128,115.30
  5. Step 5: Solve for x
    x = 3,128,115.30/1,982.53
  6. Step 6: Final answer
    x = 1,577.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.