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Finding the Fourth Proportional to 2,166.43, 3,249.92 and 779.91

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Solution

The fourth proportional to 2,166.43, 3,249.92 and 779.91 is: 1,169.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.43 : 3,249.92 = 779.91 : x
  2. Step 2: Convert to fraction form
    2,166.43/3,249.92 = 779.91/x
  3. Step 3: Cross multiply
    2,166.43x = 3,249.92 × 779.91
  4. Step 4: Simplify right side
    2,166.43x = 2,534,645.11
  5. Step 5: Solve for x
    x = 2,534,645.11/2,166.43
  6. Step 6: Final answer
    x = 1,169.96

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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.