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Finding the Fourth Proportional to 2,067.21, 3,099.36 and 768.33

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Solution

The fourth proportional to 2,067.21, 3,099.36 and 768.33 is: 1,151.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,067.21 : 3,099.36 = 768.33 : x
  2. Step 2: Convert to fraction form
    2,067.21/3,099.36 = 768.33/x
  3. Step 3: Cross multiply
    2,067.21x = 3,099.36 × 768.33
  4. Step 4: Simplify right side
    2,067.21x = 2,381,331.27
  5. Step 5: Solve for x
    x = 2,381,331.27/2,067.21
  6. Step 6: Final answer
    x = 1,151.95

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1.5x scale

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.