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Finding the Fourth Proportional to 306.38, 422.87 and 182.11

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Solution

The fourth proportional to 306.38, 422.87 and 182.11 is: 251.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.38 : 422.87 = 182.11 : x
  2. Step 2: Convert to fraction form
    306.38/422.87 = 182.11/x
  3. Step 3: Cross multiply
    306.38x = 422.87 × 182.11
  4. Step 4: Simplify right side
    306.38x = 77,008.86
  5. Step 5: Solve for x
    x = 77,008.86/306.38
  6. Step 6: Final answer
    x = 251.35

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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.