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Finding the Fourth Proportional to 300.30, 414.28 and 225.78

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Solution

The fourth proportional to 300.30, 414.28 and 225.78 is: 311.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.30 : 414.28 = 225.78 : x
  2. Step 2: Convert to fraction form
    300.30/414.28 = 225.78/x
  3. Step 3: Cross multiply
    300.30x = 414.28 × 225.78
  4. Step 4: Simplify right side
    300.30x = 93,536.14
  5. Step 5: Solve for x
    x = 93,536.14/300.30
  6. Step 6: Final answer
    x = 311.48

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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.