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Finding the Fourth Proportional to 205.70, 306.87 and 181.70

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Solution

The fourth proportional to 205.70, 306.87 and 181.70 is: 271.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.70 : 306.87 = 181.70 : x
  2. Step 2: Convert to fraction form
    205.70/306.87 = 181.70/x
  3. Step 3: Cross multiply
    205.70x = 306.87 × 181.70
  4. Step 4: Simplify right side
    205.70x = 55,757.37
  5. Step 5: Solve for x
    x = 55,757.37/205.70
  6. Step 6: Final answer
    x = 271.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.