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Finding the Fourth Proportional to 217.49, 326.25 and 109.37

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Solution

The fourth proportional to 217.49, 326.25 and 109.37 is: 164.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.49 : 326.25 = 109.37 : x
  2. Step 2: Convert to fraction form
    217.49/326.25 = 109.37/x
  3. Step 3: Cross multiply
    217.49x = 326.25 × 109.37
  4. Step 4: Simplify right side
    217.49x = 35,681.96
  5. Step 5: Solve for x
    x = 35,681.96/217.49
  6. Step 6: Final answer
    x = 164.06

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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.