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Finding the Fourth Proportional to 272.81, 408.41 and 269.21

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Solution

The fourth proportional to 272.81, 408.41 and 269.21 is: 403.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.81 : 408.41 = 269.21 : x
  2. Step 2: Convert to fraction form
    272.81/408.41 = 269.21/x
  3. Step 3: Cross multiply
    272.81x = 408.41 × 269.21
  4. Step 4: Simplify right side
    272.81x = 109,948.06
  5. Step 5: Solve for x
    x = 109,948.06/272.81
  6. Step 6: Final answer
    x = 403.02

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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.