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Finding the Fourth Proportional to 238.58, 328.79 and 164.76

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Solution

The fourth proportional to 238.58, 328.79 and 164.76 is: 227.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.58 : 328.79 = 164.76 : x
  2. Step 2: Convert to fraction form
    238.58/328.79 = 164.76/x
  3. Step 3: Cross multiply
    238.58x = 328.79 × 164.76
  4. Step 4: Simplify right side
    238.58x = 54,170.62
  5. Step 5: Solve for x
    x = 54,170.62/238.58
  6. Step 6: Final answer
    x = 227.06

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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.