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Finding the Fourth Proportional to 218.53, 301.29 and 135.55

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Solution

The fourth proportional to 218.53, 301.29 and 135.55 is: 186.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.53 : 301.29 = 135.55 : x
  2. Step 2: Convert to fraction form
    218.53/301.29 = 135.55/x
  3. Step 3: Cross multiply
    218.53x = 301.29 × 135.55
  4. Step 4: Simplify right side
    218.53x = 40,839.86
  5. Step 5: Solve for x
    x = 40,839.86/218.53
  6. Step 6: Final answer
    x = 186.88

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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.