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Finding the Fourth Proportional to 422.31, 636.60 and 350.63

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Solution

The fourth proportional to 422.31, 636.60 and 350.63 is: 528.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.31 : 636.60 = 350.63 : x
  2. Step 2: Convert to fraction form
    422.31/636.60 = 350.63/x
  3. Step 3: Cross multiply
    422.31x = 636.60 × 350.63
  4. Step 4: Simplify right side
    422.31x = 223,209.30
  5. Step 5: Solve for x
    x = 223,209.30/422.31
  6. Step 6: Final answer
    x = 528.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.