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Finding the Fourth Proportional to 205.70, 308.28 and 159.66

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Solution

The fourth proportional to 205.70, 308.28 and 159.66 is: 239.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.70 : 308.28 = 159.66 : x
  2. Step 2: Convert to fraction form
    205.70/308.28 = 159.66/x
  3. Step 3: Cross multiply
    205.70x = 308.28 × 159.66
  4. Step 4: Simplify right side
    205.70x = 49,219.98
  5. Step 5: Solve for x
    x = 49,219.98/205.70
  6. Step 6: Final answer
    x = 239.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.