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Finding the Fourth Proportional to 424.82, 636.71 and 219.27

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Solution

The fourth proportional to 424.82, 636.71 and 219.27 is: 328.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.82 : 636.71 = 219.27 : x
  2. Step 2: Convert to fraction form
    424.82/636.71 = 219.27/x
  3. Step 3: Cross multiply
    424.82x = 636.71 × 219.27
  4. Step 4: Simplify right side
    424.82x = 139,611.40
  5. Step 5: Solve for x
    x = 139,611.40/424.82
  6. Step 6: Final answer
    x = 328.64

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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.