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Finding the Third Proportional to 213.19 and 322.03

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Solution

The third proportional to 213.19 and 322.03 is: 486.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.19 : 322.03 = 322.03 : x
  2. Step 2: Convert to fraction form
    213.19/322.03 = 322.03/x
  3. Step 3: Cross multiply
    213.19x = 322.03 × 322.03
  4. Step 4: Simplify right side
    213.19x = 103,704.13
  5. Step 5: Solve for x
    x = 103,704.13/213.19
  6. Step 6: Final answer
    x = 486.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.