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Finding the Fourth Proportional to 217.92, 300.90 and 135.14

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Solution

The fourth proportional to 217.92, 300.90 and 135.14 is: 186.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.92 : 300.90 = 135.14 : x
  2. Step 2: Convert to fraction form
    217.92/300.90 = 135.14/x
  3. Step 3: Cross multiply
    217.92x = 300.90 × 135.14
  4. Step 4: Simplify right side
    217.92x = 40,663.63
  5. Step 5: Solve for x
    x = 40,663.63/217.92
  6. Step 6: Final answer
    x = 186.60

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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.