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Finding the Fourth Proportional to 306.21, 422.61 and 175.25

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Solution

The fourth proportional to 306.21, 422.61 and 175.25 is: 241.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.21 : 422.61 = 175.25 : x
  2. Step 2: Convert to fraction form
    306.21/422.61 = 175.25/x
  3. Step 3: Cross multiply
    306.21x = 422.61 × 175.25
  4. Step 4: Simplify right side
    306.21x = 74,060.29
  5. Step 5: Solve for x
    x = 74,060.29/306.21
  6. Step 6: Final answer
    x = 241.86

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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.