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Finding the Fourth Proportional to 239.96, 330.99 and 151.42

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Solution

The fourth proportional to 239.96, 330.99 and 151.42 is: 208.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.96 : 330.99 = 151.42 : x
  2. Step 2: Convert to fraction form
    239.96/330.99 = 151.42/x
  3. Step 3: Cross multiply
    239.96x = 330.99 × 151.42
  4. Step 4: Simplify right side
    239.96x = 50,117.73
  5. Step 5: Solve for x
    x = 50,117.73/239.96
  6. Step 6: Final answer
    x = 208.86

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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.