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Finding the Fourth Proportional to 306.57, 422.97 and 175.55

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Solution

The fourth proportional to 306.57, 422.97 and 175.55 is: 242.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.57 : 422.97 = 175.55 : x
  2. Step 2: Convert to fraction form
    306.57/422.97 = 175.55/x
  3. Step 3: Cross multiply
    306.57x = 422.97 × 175.55
  4. Step 4: Simplify right side
    306.57x = 74,250.27
  5. Step 5: Solve for x
    x = 74,250.27/306.57
  6. Step 6: Final answer
    x = 242.20

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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.