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Finding the Fourth Proportional to 239.32, 330 and 161.56

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Solution

The fourth proportional to 239.32, 330 and 161.56 is: 222.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.32 : 330 = 161.56 : x
  2. Step 2: Convert to fraction form
    239.32/330 = 161.56/x
  3. Step 3: Cross multiply
    239.32x = 330 × 161.56
  4. Step 4: Simplify right side
    239.32x = 53,314.80
  5. Step 5: Solve for x
    x = 53,314.80/239.32
  6. Step 6: Final answer
    x = 222.78

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1.5x scale

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.