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Finding the Fourth Proportional to 238.70, 357.69 and 212.73

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Solution

The fourth proportional to 238.70, 357.69 and 212.73 is: 318.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.70 : 357.69 = 212.73 : x
  2. Step 2: Convert to fraction form
    238.70/357.69 = 212.73/x
  3. Step 3: Cross multiply
    238.70x = 357.69 × 212.73
  4. Step 4: Simplify right side
    238.70x = 76,090.25
  5. Step 5: Solve for x
    x = 76,090.25/238.70
  6. Step 6: Final answer
    x = 318.77

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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.