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Finding the Third Proportional to 214.31 and 322.45

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Solution

The third proportional to 214.31 and 322.45 is: 485.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.31 : 322.45 = 322.45 : x
  2. Step 2: Convert to fraction form
    214.31/322.45 = 322.45/x
  3. Step 3: Cross multiply
    214.31x = 322.45 × 322.45
  4. Step 4: Simplify right side
    214.31x = 103,976.02
  5. Step 5: Solve for x
    x = 103,976.02/214.31
  6. Step 6: Final answer
    x = 485.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.