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Finding the Third Proportional to 218.06 and 376.13

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Solution

The third proportional to 218.06 and 376.13 is: 648.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.06 : 376.13 = 376.13 : x
  2. Step 2: Convert to fraction form
    218.06/376.13 = 376.13/x
  3. Step 3: Cross multiply
    218.06x = 376.13 × 376.13
  4. Step 4: Simplify right side
    218.06x = 141,470.02
  5. Step 5: Solve for x
    x = 141,470.02/218.06
  6. Step 6: Final answer
    x = 648.76

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.