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Finding the Fourth Proportional to 239.21, 329.73 and 151.73

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Solution

The fourth proportional to 239.21, 329.73 and 151.73 is: 209.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.21 : 329.73 = 151.73 : x
  2. Step 2: Convert to fraction form
    239.21/329.73 = 151.73/x
  3. Step 3: Cross multiply
    239.21x = 329.73 × 151.73
  4. Step 4: Simplify right side
    239.21x = 50,029.93
  5. Step 5: Solve for x
    x = 50,029.93/239.21
  6. Step 6: Final answer
    x = 209.15

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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.