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Finding the Fourth Proportional to 299.82, 413.73 and 221.18

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Solution

The fourth proportional to 299.82, 413.73 and 221.18 is: 305.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.82 : 413.73 = 221.18 : x
  2. Step 2: Convert to fraction form
    299.82/413.73 = 221.18/x
  3. Step 3: Cross multiply
    299.82x = 413.73 × 221.18
  4. Step 4: Simplify right side
    299.82x = 91,510.41
  5. Step 5: Solve for x
    x = 91,510.41/299.82
  6. Step 6: Final answer
    x = 305.21

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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.