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Finding the Fourth Proportional to 300.69, 414.72 and 221.99

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Solution

The fourth proportional to 300.69, 414.72 and 221.99 is: 306.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.69 : 414.72 = 221.99 : x
  2. Step 2: Convert to fraction form
    300.69/414.72 = 221.99/x
  3. Step 3: Cross multiply
    300.69x = 414.72 × 221.99
  4. Step 4: Simplify right side
    300.69x = 92,061.62
  5. Step 5: Solve for x
    x = 92,061.62/300.69
  6. Step 6: Final answer
    x = 306.17

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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.