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Finding the Fourth Proportional to 217.07, 324.87 and 134.85

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Solution

The fourth proportional to 217.07, 324.87 and 134.85 is: 201.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.07 : 324.87 = 134.85 : x
  2. Step 2: Convert to fraction form
    217.07/324.87 = 134.85/x
  3. Step 3: Cross multiply
    217.07x = 324.87 × 134.85
  4. Step 4: Simplify right side
    217.07x = 43,808.72
  5. Step 5: Solve for x
    x = 43,808.72/217.07
  6. Step 6: Final answer
    x = 201.82

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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.