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Finding the Fourth Proportional to 299.28, 448.92 and 272.28

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Solution

The fourth proportional to 299.28, 448.92 and 272.28 is: 408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.28 : 448.92 = 272.28 : x
  2. Step 2: Convert to fraction form
    299.28/448.92 = 272.28/x
  3. Step 3: Cross multiply
    299.28x = 448.92 × 272.28
  4. Step 4: Simplify right side
    299.28x = 122,231.94
  5. Step 5: Solve for x
    x = 122,231.94/299.28
  6. Step 6: Final answer
    x = 408.42

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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.