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Finding the Fourth Proportional to 272.16, 408.32 and 109.96

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Solution

The fourth proportional to 272.16, 408.32 and 109.96 is: 164.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.16 : 408.32 = 109.96 : x
  2. Step 2: Convert to fraction form
    272.16/408.32 = 109.96/x
  3. Step 3: Cross multiply
    272.16x = 408.32 × 109.96
  4. Step 4: Simplify right side
    272.16x = 44,898.87
  5. Step 5: Solve for x
    x = 44,898.87/272.16
  6. Step 6: Final answer
    x = 164.97

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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.