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Finding the Fourth Proportional to 217.26, 299.55 and 168.12

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Solution

The fourth proportional to 217.26, 299.55 and 168.12 is: 231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.26 : 299.55 = 168.12 : x
  2. Step 2: Convert to fraction form
    217.26/299.55 = 168.12/x
  3. Step 3: Cross multiply
    217.26x = 299.55 × 168.12
  4. Step 4: Simplify right side
    217.26x = 50,360.35
  5. Step 5: Solve for x
    x = 50,360.35/217.26
  6. Step 6: Final answer
    x = 231.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.