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Finding the Fourth Proportional to 238.39, 357.54 and 76.12

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Solution

The fourth proportional to 238.39, 357.54 and 76.12 is: 114.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.39 : 357.54 = 76.12 : x
  2. Step 2: Convert to fraction form
    238.39/357.54 = 76.12/x
  3. Step 3: Cross multiply
    238.39x = 357.54 × 76.12
  4. Step 4: Simplify right side
    238.39x = 27,215.94
  5. Step 5: Solve for x
    x = 27,215.94/238.39
  6. Step 6: Final answer
    x = 114.17

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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.