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Finding the Fourth Proportional to 791.35, 1,186.59 and 329.47

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Solution

The fourth proportional to 791.35, 1,186.59 and 329.47 is: 494.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.35 : 1,186.59 = 329.47 : x
  2. Step 2: Convert to fraction form
    791.35/1,186.59 = 329.47/x
  3. Step 3: Cross multiply
    791.35x = 1,186.59 × 329.47
  4. Step 4: Simplify right side
    791.35x = 390,945.81
  5. Step 5: Solve for x
    x = 390,945.81/791.35
  6. Step 6: Final answer
    x = 494.02

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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.