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Finding the Fourth Proportional to 791.88, 1,186.81 and 329.37

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Solution

The fourth proportional to 791.88, 1,186.81 and 329.37 is: 493.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.88 : 1,186.81 = 329.37 : x
  2. Step 2: Convert to fraction form
    791.88/1,186.81 = 329.37/x
  3. Step 3: Cross multiply
    791.88x = 1,186.81 × 329.37
  4. Step 4: Simplify right side
    791.88x = 390,898.79
  5. Step 5: Solve for x
    x = 390,898.79/791.88
  6. Step 6: Final answer
    x = 493.63

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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.