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Finding the Fourth Proportional to 239.40, 330.46 and 159.66

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Solution

The fourth proportional to 239.40, 330.46 and 159.66 is: 220.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.40 : 330.46 = 159.66 : x
  2. Step 2: Convert to fraction form
    239.40/330.46 = 159.66/x
  3. Step 3: Cross multiply
    239.40x = 330.46 × 159.66
  4. Step 4: Simplify right side
    239.40x = 52,761.24
  5. Step 5: Solve for x
    x = 52,761.24/239.40
  6. Step 6: Final answer
    x = 220.39

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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.