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Finding the Fourth Proportional to 791.13, 1,091.67 and 459.44

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Solution

The fourth proportional to 791.13, 1,091.67 and 459.44 is: 633.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.13 : 1,091.67 = 459.44 : x
  2. Step 2: Convert to fraction form
    791.13/1,091.67 = 459.44/x
  3. Step 3: Cross multiply
    791.13x = 1,091.67 × 459.44
  4. Step 4: Simplify right side
    791.13x = 501,556.86
  5. Step 5: Solve for x
    x = 501,556.86/791.13
  6. Step 6: Final answer
    x = 633.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.