Home / 1,489.14-2,232.88-668.20

Finding the Fourth Proportional to 1,489.14, 2,232.88 and 668.20

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Solution

The fourth proportional to 1,489.14, 2,232.88 and 668.20 is: 1,001.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.14 : 2,232.88 = 668.20 : x
  2. Step 2: Convert to fraction form
    1,489.14/2,232.88 = 668.20/x
  3. Step 3: Cross multiply
    1,489.14x = 2,232.88 × 668.20
  4. Step 4: Simplify right side
    1,489.14x = 1,491,997.58
  5. Step 5: Solve for x
    x = 1,491,997.58/1,489.14
  6. Step 6: Final answer
    x = 1,001.92

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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.