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Finding the Fourth Proportional to 424.94, 636.62 and 219.29

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Solution

The fourth proportional to 424.94, 636.62 and 219.29 is: 328.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.94 : 636.62 = 219.29 : x
  2. Step 2: Convert to fraction form
    424.94/636.62 = 219.29/x
  3. Step 3: Cross multiply
    424.94x = 636.62 × 219.29
  4. Step 4: Simplify right side
    424.94x = 139,600.12
  5. Step 5: Solve for x
    x = 139,600.12/424.94
  6. Step 6: Final answer
    x = 328.52

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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.