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Finding the Fourth Proportional to 213.60, 294.81 and 134.85

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Solution

The fourth proportional to 213.60, 294.81 and 134.85 is: 186.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.60 : 294.81 = 134.85 : x
  2. Step 2: Convert to fraction form
    213.60/294.81 = 134.85/x
  3. Step 3: Cross multiply
    213.60x = 294.81 × 134.85
  4. Step 4: Simplify right side
    213.60x = 39,755.13
  5. Step 5: Solve for x
    x = 39,755.13/213.60
  6. Step 6: Final answer
    x = 186.12

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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.