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Finding the Fourth Proportional to 306.10, 422.42 and 173.32

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Solution

The fourth proportional to 306.10, 422.42 and 173.32 is: 239.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.10 : 422.42 = 173.32 : x
  2. Step 2: Convert to fraction form
    306.10/422.42 = 173.32/x
  3. Step 3: Cross multiply
    306.10x = 422.42 × 173.32
  4. Step 4: Simplify right side
    306.10x = 73,212.97
  5. Step 5: Solve for x
    x = 73,212.97/306.10
  6. Step 6: Final answer
    x = 239.18

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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.