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Finding the Fourth Proportional to 2,739.43, 4,109.05 and 791.83

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Solution

The fourth proportional to 2,739.43, 4,109.05 and 791.83 is: 1,187.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.43 : 4,109.05 = 791.83 : x
  2. Step 2: Convert to fraction form
    2,739.43/4,109.05 = 791.83/x
  3. Step 3: Cross multiply
    2,739.43x = 4,109.05 × 791.83
  4. Step 4: Simplify right side
    2,739.43x = 3,253,669.06
  5. Step 5: Solve for x
    x = 3,253,669.06/2,739.43
  6. Step 6: Final answer
    x = 1,187.72

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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.