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Finding the Fourth Proportional to 299.43, 413.21 and 166.66

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Solution

The fourth proportional to 299.43, 413.21 and 166.66 is: 229.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.43 : 413.21 = 166.66 : x
  2. Step 2: Convert to fraction form
    299.43/413.21 = 166.66/x
  3. Step 3: Cross multiply
    299.43x = 413.21 × 166.66
  4. Step 4: Simplify right side
    299.43x = 68,865.58
  5. Step 5: Solve for x
    x = 68,865.58/299.43
  6. Step 6: Final answer
    x = 229.99

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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.