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Finding the Fourth Proportional to 239.20, 329.70 and 165.48

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Solution

The fourth proportional to 239.20, 329.70 and 165.48 is: 228.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.20 : 329.70 = 165.48 : x
  2. Step 2: Convert to fraction form
    239.20/329.70 = 165.48/x
  3. Step 3: Cross multiply
    239.20x = 329.70 × 165.48
  4. Step 4: Simplify right side
    239.20x = 54,558.76
  5. Step 5: Solve for x
    x = 54,558.76/239.20
  6. Step 6: Final answer
    x = 228.09

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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.