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Finding the Fourth Proportional to 217.47, 326.21 and 136.37

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Solution

The fourth proportional to 217.47, 326.21 and 136.37 is: 204.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.47 : 326.21 = 136.37 : x
  2. Step 2: Convert to fraction form
    217.47/326.21 = 136.37/x
  3. Step 3: Cross multiply
    217.47x = 326.21 × 136.37
  4. Step 4: Simplify right side
    217.47x = 44,485.26
  5. Step 5: Solve for x
    x = 44,485.26/217.47
  6. Step 6: Final answer
    x = 204.56

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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.