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Finding the Fourth Proportional to 217.40, 300.05 and 134.54

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Solution

The fourth proportional to 217.40, 300.05 and 134.54 is: 185.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.40 : 300.05 = 134.54 : x
  2. Step 2: Convert to fraction form
    217.40/300.05 = 134.54/x
  3. Step 3: Cross multiply
    217.40x = 300.05 × 134.54
  4. Step 4: Simplify right side
    217.40x = 40,369.22
  5. Step 5: Solve for x
    x = 40,369.22/217.40
  6. Step 6: Final answer
    x = 185.69

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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.