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Finding the Fourth Proportional to 238.48, 329.03 and 155.45

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Solution

The fourth proportional to 238.48, 329.03 and 155.45 is: 214.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.48 : 329.03 = 155.45 : x
  2. Step 2: Convert to fraction form
    238.48/329.03 = 155.45/x
  3. Step 3: Cross multiply
    238.48x = 329.03 × 155.45
  4. Step 4: Simplify right side
    238.48x = 51,148.34
  5. Step 5: Solve for x
    x = 51,148.34/238.48
  6. Step 6: Final answer
    x = 214.48

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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.