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Finding the Fourth Proportional to 413.62, 620.19 and 169.87

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Solution

The fourth proportional to 413.62, 620.19 and 169.87 is: 254.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.62 : 620.19 = 169.87 : x
  2. Step 2: Convert to fraction form
    413.62/620.19 = 169.87/x
  3. Step 3: Cross multiply
    413.62x = 620.19 × 169.87
  4. Step 4: Simplify right side
    413.62x = 105,351.68
  5. Step 5: Solve for x
    x = 105,351.68/413.62
  6. Step 6: Final answer
    x = 254.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.