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Finding the Fourth Proportional to 217, 299.46 and 118.75

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Solution

The fourth proportional to 217, 299.46 and 118.75 is: 163.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    217 : 299.46 = 118.75 : x
  2. Step 2: Convert to fraction form
    217/299.46 = 118.75/x
  3. Step 3: Cross multiply
    217x = 299.46 × 118.75
  4. Step 4: Simplify right side
    217x = 35,560.88
  5. Step 5: Solve for x
    x = 35,560.88/217
  6. Step 6: Final answer
    x = 163.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.