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Finding the Fourth Proportional to 238.57, 329.22 and 145.33

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Solution

The fourth proportional to 238.57, 329.22 and 145.33 is: 200.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.57 : 329.22 = 145.33 : x
  2. Step 2: Convert to fraction form
    238.57/329.22 = 145.33/x
  3. Step 3: Cross multiply
    238.57x = 329.22 × 145.33
  4. Step 4: Simplify right side
    238.57x = 47,844.72
  5. Step 5: Solve for x
    x = 47,844.72/238.57
  6. Step 6: Final answer
    x = 200.55

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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.