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Finding the Fourth Proportional to 791.31, 1,185.44 and 443.59

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Solution

The fourth proportional to 791.31, 1,185.44 and 443.59 is: 664.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.31 : 1,185.44 = 443.59 : x
  2. Step 2: Convert to fraction form
    791.31/1,185.44 = 443.59/x
  3. Step 3: Cross multiply
    791.31x = 1,185.44 × 443.59
  4. Step 4: Simplify right side
    791.31x = 525,849.33
  5. Step 5: Solve for x
    x = 525,849.33/791.31
  6. Step 6: Final answer
    x = 664.53

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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.