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Finding the Fourth Proportional to 300.11, 413.90 and 211.88

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Solution

The fourth proportional to 300.11, 413.90 and 211.88 is: 292.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.11 : 413.90 = 211.88 : x
  2. Step 2: Convert to fraction form
    300.11/413.90 = 211.88/x
  3. Step 3: Cross multiply
    300.11x = 413.90 × 211.88
  4. Step 4: Simplify right side
    300.11x = 87,698.70
  5. Step 5: Solve for x
    x = 87,698.70/300.11
  6. Step 6: Final answer
    x = 292.23

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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.