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Finding the Fourth Proportional to 218.19, 301.25 and 135.41

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Solution

The fourth proportional to 218.19, 301.25 and 135.41 is: 186.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.19 : 301.25 = 135.41 : x
  2. Step 2: Convert to fraction form
    218.19/301.25 = 135.41/x
  3. Step 3: Cross multiply
    218.19x = 301.25 × 135.41
  4. Step 4: Simplify right side
    218.19x = 40,790.08
  5. Step 5: Solve for x
    x = 40,790.08/218.19
  6. Step 6: Final answer
    x = 186.95

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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.