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Finding the Fourth Proportional to 238.86, 329.49 and 151.47

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Solution

The fourth proportional to 238.86, 329.49 and 151.47 is: 208.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.86 : 329.49 = 151.47 : x
  2. Step 2: Convert to fraction form
    238.86/329.49 = 151.47/x
  3. Step 3: Cross multiply
    238.86x = 329.49 × 151.47
  4. Step 4: Simplify right side
    238.86x = 49,907.85
  5. Step 5: Solve for x
    x = 49,907.85/238.86
  6. Step 6: Final answer
    x = 208.94

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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.