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Finding the Third Proportional to 218.21 and 442.76

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Solution

The third proportional to 218.21 and 442.76 is: 898.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.21 : 442.76 = 442.76 : x
  2. Step 2: Convert to fraction form
    218.21/442.76 = 442.76/x
  3. Step 3: Cross multiply
    218.21x = 442.76 × 442.76
  4. Step 4: Simplify right side
    218.21x = 196,034.48
  5. Step 5: Solve for x
    x = 196,034.48/218.21
  6. Step 6: Final answer
    x = 898.36

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.