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Finding the Fourth Proportional to 266.38, 367.67 and 238.70

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Solution

The fourth proportional to 266.38, 367.67 and 238.70 is: 329.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.38 : 367.67 = 238.70 : x
  2. Step 2: Convert to fraction form
    266.38/367.67 = 238.70/x
  3. Step 3: Cross multiply
    266.38x = 367.67 × 238.70
  4. Step 4: Simplify right side
    266.38x = 87,762.37
  5. Step 5: Solve for x
    x = 87,762.37/266.38
  6. Step 6: Final answer
    x = 329.47

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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.