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Finding the Fourth Proportional to 238.56, 329.10 and 155.66

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Solution

The fourth proportional to 238.56, 329.10 and 155.66 is: 214.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.56 : 329.10 = 155.66 : x
  2. Step 2: Convert to fraction form
    238.56/329.10 = 155.66/x
  3. Step 3: Cross multiply
    238.56x = 329.10 × 155.66
  4. Step 4: Simplify right side
    238.56x = 51,227.71
  5. Step 5: Solve for x
    x = 51,227.71/238.56
  6. Step 6: Final answer
    x = 214.74

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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.