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Finding the Fourth Proportional to 299.76, 413.70 and 168.80

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Solution

The fourth proportional to 299.76, 413.70 and 168.80 is: 232.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.76 : 413.70 = 168.80 : x
  2. Step 2: Convert to fraction form
    299.76/413.70 = 168.80/x
  3. Step 3: Cross multiply
    299.76x = 413.70 × 168.80
  4. Step 4: Simplify right side
    299.76x = 69,832.56
  5. Step 5: Solve for x
    x = 69,832.56/299.76
  6. Step 6: Final answer
    x = 232.96

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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.