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Finding the Fourth Proportional to 217.44, 300.15 and 168.21

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Solution

The fourth proportional to 217.44, 300.15 and 168.21 is: 232.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.44 : 300.15 = 168.21 : x
  2. Step 2: Convert to fraction form
    217.44/300.15 = 168.21/x
  3. Step 3: Cross multiply
    217.44x = 300.15 × 168.21
  4. Step 4: Simplify right side
    217.44x = 50,488.23
  5. Step 5: Solve for x
    x = 50,488.23/217.44
  6. Step 6: Final answer
    x = 232.19

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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.