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Finding the Fourth Proportional to 306, 422.22 and 181.61

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Solution

The fourth proportional to 306, 422.22 and 181.61 is: 250.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    306 : 422.22 = 181.61 : x
  2. Step 2: Convert to fraction form
    306/422.22 = 181.61/x
  3. Step 3: Cross multiply
    306x = 422.22 × 181.61
  4. Step 4: Simplify right side
    306x = 76,680.43
  5. Step 5: Solve for x
    x = 76,680.43/306
  6. Step 6: Final answer
    x = 250.59

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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.