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Finding the Fourth Proportional to 239.13, 329.94 and 151.79

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Solution

The fourth proportional to 239.13, 329.94 and 151.79 is: 209.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.13 : 329.94 = 151.79 : x
  2. Step 2: Convert to fraction form
    239.13/329.94 = 151.79/x
  3. Step 3: Cross multiply
    239.13x = 329.94 × 151.79
  4. Step 4: Simplify right side
    239.13x = 50,079.94
  5. Step 5: Solve for x
    x = 50,079.94/239.13
  6. Step 6: Final answer
    x = 209.43

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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.