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Finding the Fourth Proportional to 238.43, 329.43 and 189.68

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Solution

The fourth proportional to 238.43, 329.43 and 189.68 is: 262.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.43 : 329.43 = 189.68 : x
  2. Step 2: Convert to fraction form
    238.43/329.43 = 189.68/x
  3. Step 3: Cross multiply
    238.43x = 329.43 × 189.68
  4. Step 4: Simplify right side
    238.43x = 62,486.28
  5. Step 5: Solve for x
    x = 62,486.28/238.43
  6. Step 6: Final answer
    x = 262.07

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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.