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Finding the Fourth Proportional to 272.50, 408.74 and 107.92

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Solution

The fourth proportional to 272.50, 408.74 and 107.92 is: 161.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.50 : 408.74 = 107.92 : x
  2. Step 2: Convert to fraction form
    272.50/408.74 = 107.92/x
  3. Step 3: Cross multiply
    272.50x = 408.74 × 107.92
  4. Step 4: Simplify right side
    272.50x = 44,111.22
  5. Step 5: Solve for x
    x = 44,111.22/272.50
  6. Step 6: Final answer
    x = 161.88

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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.