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Finding the Third Proportional to 258 and 335.25

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Solution

The third proportional to 258 and 335.25 is: 435.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    258 : 335.25 = 335.25 : x
  2. Step 2: Convert to fraction form
    258/335.25 = 335.25/x
  3. Step 3: Cross multiply
    258x = 335.25 × 335.25
  4. Step 4: Simplify right side
    258x = 112,392.56
  5. Step 5: Solve for x
    x = 112,392.56/258
  6. Step 6: Final answer
    x = 435.63

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.