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Finding the Fourth Proportional to 424.26, 636.30 and 150.21

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Solution

The fourth proportional to 424.26, 636.30 and 150.21 is: 225.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.26 : 636.30 = 150.21 : x
  2. Step 2: Convert to fraction form
    424.26/636.30 = 150.21/x
  3. Step 3: Cross multiply
    424.26x = 636.30 × 150.21
  4. Step 4: Simplify right side
    424.26x = 95,578.62
  5. Step 5: Solve for x
    x = 95,578.62/424.26
  6. Step 6: Final answer
    x = 225.28

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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.