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Finding the Third Proportional to 220.22 and 322.31

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Solution

The third proportional to 220.22 and 322.31 is: 471.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.22 : 322.31 = 322.31 : x
  2. Step 2: Convert to fraction form
    220.22/322.31 = 322.31/x
  3. Step 3: Cross multiply
    220.22x = 322.31 × 322.31
  4. Step 4: Simplify right side
    220.22x = 103,885.35
  5. Step 5: Solve for x
    x = 103,885.35/220.22
  6. Step 6: Final answer
    x = 471.74

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.