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Finding the Fourth Proportional to 253.26, 379.92 and 108.96

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Solution

The fourth proportional to 253.26, 379.92 and 108.96 is: 163.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.26 : 379.92 = 108.96 : x
  2. Step 2: Convert to fraction form
    253.26/379.92 = 108.96/x
  3. Step 3: Cross multiply
    253.26x = 379.92 × 108.96
  4. Step 4: Simplify right side
    253.26x = 41,396.08
  5. Step 5: Solve for x
    x = 41,396.08/253.26
  6. Step 6: Final answer
    x = 163.45

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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.