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Finding the Fourth Proportional to 327.47, 491.20 and 154.26

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Solution

The fourth proportional to 327.47, 491.20 and 154.26 is: 231.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.47 : 491.20 = 154.26 : x
  2. Step 2: Convert to fraction form
    327.47/491.20 = 154.26/x
  3. Step 3: Cross multiply
    327.47x = 491.20 × 154.26
  4. Step 4: Simplify right side
    327.47x = 75,771.28
  5. Step 5: Solve for x
    x = 75,771.28/327.47
  6. Step 6: Final answer
    x = 231.38

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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.