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Finding the Fourth Proportional to 306.12, 422.13 and 266.73

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Solution

The fourth proportional to 306.12, 422.13 and 266.73 is: 367.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.12 : 422.13 = 266.73 : x
  2. Step 2: Convert to fraction form
    306.12/422.13 = 266.73/x
  3. Step 3: Cross multiply
    306.12x = 422.13 × 266.73
  4. Step 4: Simplify right side
    306.12x = 112,594.73
  5. Step 5: Solve for x
    x = 112,594.73/306.12
  6. Step 6: Final answer
    x = 367.81

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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.