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Finding the Third Proportional to 218.95 and 494.86

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Solution

The third proportional to 218.95 and 494.86 is: 1,118.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.95 : 494.86 = 494.86 : x
  2. Step 2: Convert to fraction form
    218.95/494.86 = 494.86/x
  3. Step 3: Cross multiply
    218.95x = 494.86 × 494.86
  4. Step 4: Simplify right side
    218.95x = 244,885.80
  5. Step 5: Solve for x
    x = 244,885.80/218.95
  6. Step 6: Final answer
    x = 1,118.44

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Why These Related Problems?

These problems maintain the same ratio (2.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.