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Finding the Fourth Proportional to 2,249.93, 3,371.85 and 861.99

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Solution

The fourth proportional to 2,249.93, 3,371.85 and 861.99 is: 1,291.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,249.93 : 3,371.85 = 861.99 : x
  2. Step 2: Convert to fraction form
    2,249.93/3,371.85 = 861.99/x
  3. Step 3: Cross multiply
    2,249.93x = 3,371.85 × 861.99
  4. Step 4: Simplify right side
    2,249.93x = 2,906,500.98
  5. Step 5: Solve for x
    x = 2,906,500.98/2,249.93
  6. Step 6: Final answer
    x = 1,291.82

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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.