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Finding the Third Proportional to 258.75 and 433.13

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Solution

The third proportional to 258.75 and 433.13 is: 725.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.75 : 433.13 = 433.13 : x
  2. Step 2: Convert to fraction form
    258.75/433.13 = 433.13/x
  3. Step 3: Cross multiply
    258.75x = 433.13 × 433.13
  4. Step 4: Simplify right side
    258.75x = 187,597.27
  5. Step 5: Solve for x
    x = 187,597.27/258.75
  6. Step 6: Final answer
    x = 725.01

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.