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Finding the Fourth Proportional to 492.69, 738.81 and 218.97

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Solution

The fourth proportional to 492.69, 738.81 and 218.97 is: 328.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.69 : 738.81 = 218.97 : x
  2. Step 2: Convert to fraction form
    492.69/738.81 = 218.97/x
  3. Step 3: Cross multiply
    492.69x = 738.81 × 218.97
  4. Step 4: Simplify right side
    492.69x = 161,777.23
  5. Step 5: Solve for x
    x = 161,777.23/492.69
  6. Step 6: Final answer
    x = 328.36

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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.