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Finding the Fourth Proportional to 423.42, 635.22 and 134.82

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Solution

The fourth proportional to 423.42, 635.22 and 134.82 is: 202.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.42 : 635.22 = 134.82 : x
  2. Step 2: Convert to fraction form
    423.42/635.22 = 134.82/x
  3. Step 3: Cross multiply
    423.42x = 635.22 × 134.82
  4. Step 4: Simplify right side
    423.42x = 85,640.36
  5. Step 5: Solve for x
    x = 85,640.36/423.42
  6. Step 6: Final answer
    x = 202.26

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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.