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Finding the Third Proportional to 218 and 298

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Solution

The third proportional to 218 and 298 is: 407.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    218 : 298 = 298 : x
  2. Step 2: Convert to fraction form
    218/298 = 298/x
  3. Step 3: Cross multiply
    218x = 298 × 298
  4. Step 4: Simplify right side
    218x = 88,804
  5. Step 5: Solve for x
    x = 88,804/218
  6. Step 6: Final answer
    x = 407.36

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.