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Finding the Fourth Proportional to 209.97, 289.62 and 166.23

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Solution

The fourth proportional to 209.97, 289.62 and 166.23 is: 229.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.97 : 289.62 = 166.23 : x
  2. Step 2: Convert to fraction form
    209.97/289.62 = 166.23/x
  3. Step 3: Cross multiply
    209.97x = 289.62 × 166.23
  4. Step 4: Simplify right side
    209.97x = 48,143.53
  5. Step 5: Solve for x
    x = 48,143.53/209.97
  6. Step 6: Final answer
    x = 229.29

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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.