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Finding the Fourth Proportional to 272.08, 408.32 and 211.06

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Solution

The fourth proportional to 272.08, 408.32 and 211.06 is: 316.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.08 : 408.32 = 211.06 : x
  2. Step 2: Convert to fraction form
    272.08/408.32 = 211.06/x
  3. Step 3: Cross multiply
    272.08x = 408.32 × 211.06
  4. Step 4: Simplify right side
    272.08x = 86,180.02
  5. Step 5: Solve for x
    x = 86,180.02/272.08
  6. Step 6: Final answer
    x = 316.75

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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.