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Finding the Fourth Proportional to 276.05, 413.62 and 121.75

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Solution

The fourth proportional to 276.05, 413.62 and 121.75 is: 182.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.05 : 413.62 = 121.75 : x
  2. Step 2: Convert to fraction form
    276.05/413.62 = 121.75/x
  3. Step 3: Cross multiply
    276.05x = 413.62 × 121.75
  4. Step 4: Simplify right side
    276.05x = 50,356.90
  5. Step 5: Solve for x
    x = 50,356.90/276.05
  6. Step 6: Final answer
    x = 182.42

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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.