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Finding the Third Proportional to 287.13 and 439.25

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Solution

The third proportional to 287.13 and 439.25 is: 671.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.13 : 439.25 = 439.25 : x
  2. Step 2: Convert to fraction form
    287.13/439.25 = 439.25/x
  3. Step 3: Cross multiply
    287.13x = 439.25 × 439.25
  4. Step 4: Simplify right side
    287.13x = 192,940.56
  5. Step 5: Solve for x
    x = 192,940.56/287.13
  6. Step 6: Final answer
    x = 671.97

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.