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Finding the Fourth Proportional to 306.31, 422.71 and 166.43

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Solution

The fourth proportional to 306.31, 422.71 and 166.43 is: 229.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.31 : 422.71 = 166.43 : x
  2. Step 2: Convert to fraction form
    306.31/422.71 = 166.43/x
  3. Step 3: Cross multiply
    306.31x = 422.71 × 166.43
  4. Step 4: Simplify right side
    306.31x = 70,349.51
  5. Step 5: Solve for x
    x = 70,349.51/306.31
  6. Step 6: Final answer
    x = 229.67

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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.