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Finding the Fourth Proportional to 2,166.38, 3,249.21 and 779.44

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Solution

The fourth proportional to 2,166.38, 3,249.21 and 779.44 is: 1,169.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.38 : 3,249.21 = 779.44 : x
  2. Step 2: Convert to fraction form
    2,166.38/3,249.21 = 779.44/x
  3. Step 3: Cross multiply
    2,166.38x = 3,249.21 × 779.44
  4. Step 4: Simplify right side
    2,166.38x = 2,532,564.24
  5. Step 5: Solve for x
    x = 2,532,564.24/2,166.38
  6. Step 6: Final answer
    x = 1,169.03

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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.