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Finding the Third Proportional to 218.44 and 433.13

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Solution

The third proportional to 218.44 and 433.13 is: 858.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.44 : 433.13 = 433.13 : x
  2. Step 2: Convert to fraction form
    218.44/433.13 = 433.13/x
  3. Step 3: Cross multiply
    218.44x = 433.13 × 433.13
  4. Step 4: Simplify right side
    218.44x = 187,597.27
  5. Step 5: Solve for x
    x = 187,597.27/218.44
  6. Step 6: Final answer
    x = 858.81

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Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.