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Finding the Fourth Proportional to 306.18, 422.42 and 173.39

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Solution

The fourth proportional to 306.18, 422.42 and 173.39 is: 239.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.18 : 422.42 = 173.39 : x
  2. Step 2: Convert to fraction form
    306.18/422.42 = 173.39/x
  3. Step 3: Cross multiply
    306.18x = 422.42 × 173.39
  4. Step 4: Simplify right side
    306.18x = 73,240.42
  5. Step 5: Solve for x
    x = 73,240.42/306.18
  6. Step 6: Final answer
    x = 239.21

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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.