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Finding the Fourth Proportional to 238.75, 357.48 and 135.95

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Solution

The fourth proportional to 238.75, 357.48 and 135.95 is: 203.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.75 : 357.48 = 135.95 : x
  2. Step 2: Convert to fraction form
    238.75/357.48 = 135.95/x
  3. Step 3: Cross multiply
    238.75x = 357.48 × 135.95
  4. Step 4: Simplify right side
    238.75x = 48,597.62
  5. Step 5: Solve for x
    x = 48,597.62/238.75
  6. Step 6: Final answer
    x = 203.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.