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Finding the Third Proportional to 320.48 and 497.81

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Solution

The third proportional to 320.48 and 497.81 is: 773.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.48 : 497.81 = 497.81 : x
  2. Step 2: Convert to fraction form
    320.48/497.81 = 497.81/x
  3. Step 3: Cross multiply
    320.48x = 497.81 × 497.81
  4. Step 4: Simplify right side
    320.48x = 247,817.29
  5. Step 5: Solve for x
    x = 247,817.29/320.48
  6. Step 6: Final answer
    x = 773.26

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.