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Finding the Fourth Proportional to 492.25, 738.38 and 218.52

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Solution

The fourth proportional to 492.25, 738.38 and 218.52 is: 327.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.25 : 738.38 = 218.52 : x
  2. Step 2: Convert to fraction form
    492.25/738.38 = 218.52/x
  3. Step 3: Cross multiply
    492.25x = 738.38 × 218.52
  4. Step 4: Simplify right side
    492.25x = 161,350.80
  5. Step 5: Solve for x
    x = 161,350.80/492.25
  6. Step 6: Final answer
    x = 327.78

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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.