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Finding the Fourth Proportional to 217.75, 300.41 and 134.71

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Solution

The fourth proportional to 217.75, 300.41 and 134.71 is: 185.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.75 : 300.41 = 134.71 : x
  2. Step 2: Convert to fraction form
    217.75/300.41 = 134.71/x
  3. Step 3: Cross multiply
    217.75x = 300.41 × 134.71
  4. Step 4: Simplify right side
    217.75x = 40,466.81
  5. Step 5: Solve for x
    x = 40,466.81/217.75
  6. Step 6: Final answer
    x = 185.84

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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.