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Finding the Fourth Proportional to 422.14, 635.28 and 349.60

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Solution

The fourth proportional to 422.14, 635.28 and 349.60 is: 526.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.14 : 635.28 = 349.60 : x
  2. Step 2: Convert to fraction form
    422.14/635.28 = 349.60/x
  3. Step 3: Cross multiply
    422.14x = 635.28 × 349.60
  4. Step 4: Simplify right side
    422.14x = 222,093.89
  5. Step 5: Solve for x
    x = 222,093.89/422.14
  6. Step 6: Final answer
    x = 526.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.