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Finding the Fourth Proportional to 239.99, 331.36 and 151.50

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Solution

The fourth proportional to 239.99, 331.36 and 151.50 is: 209.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.99 : 331.36 = 151.50 : x
  2. Step 2: Convert to fraction form
    239.99/331.36 = 151.50/x
  3. Step 3: Cross multiply
    239.99x = 331.36 × 151.50
  4. Step 4: Simplify right side
    239.99x = 50,201.04
  5. Step 5: Solve for x
    x = 50,201.04/239.99
  6. Step 6: Final answer
    x = 209.18

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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.