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Finding the Third Proportional to 320.50 and 481.75

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Solution

The third proportional to 320.50 and 481.75 is: 724.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.50 : 481.75 = 481.75 : x
  2. Step 2: Convert to fraction form
    320.50/481.75 = 481.75/x
  3. Step 3: Cross multiply
    320.50x = 481.75 × 481.75
  4. Step 4: Simplify right side
    320.50x = 232,083.06
  5. Step 5: Solve for x
    x = 232,083.06/320.50
  6. Step 6: Final answer
    x = 724.13

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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.