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Finding the Fourth Proportional to 299.50, 413.31 and 168.55

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Solution

The fourth proportional to 299.50, 413.31 and 168.55 is: 232.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.50 : 413.31 = 168.55 : x
  2. Step 2: Convert to fraction form
    299.50/413.31 = 168.55/x
  3. Step 3: Cross multiply
    299.50x = 413.31 × 168.55
  4. Step 4: Simplify right side
    299.50x = 69,663.40
  5. Step 5: Solve for x
    x = 69,663.40/299.50
  6. Step 6: Final answer
    x = 232.60

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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.