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Finding the Fourth Proportional to 239.18, 330.29 and 160.55

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Solution

The fourth proportional to 239.18, 330.29 and 160.55 is: 221.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.18 : 330.29 = 160.55 : x
  2. Step 2: Convert to fraction form
    239.18/330.29 = 160.55/x
  3. Step 3: Cross multiply
    239.18x = 330.29 × 160.55
  4. Step 4: Simplify right side
    239.18x = 53,028.68
  5. Step 5: Solve for x
    x = 53,028.68/239.18
  6. Step 6: Final answer
    x = 221.71

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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.