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Finding the Fourth Proportional to 2,679.44, 4,019.21 and 731.70

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Solution

The fourth proportional to 2,679.44, 4,019.21 and 731.70 is: 1,097.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.44 : 4,019.21 = 731.70 : x
  2. Step 2: Convert to fraction form
    2,679.44/4,019.21 = 731.70/x
  3. Step 3: Cross multiply
    2,679.44x = 4,019.21 × 731.70
  4. Step 4: Simplify right side
    2,679.44x = 2,940,855.96
  5. Step 5: Solve for x
    x = 2,940,855.96/2,679.44
  6. Step 6: Final answer
    x = 1,097.56

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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.