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Finding the Third Proportional to 402.75 and 605.25

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Solution

The third proportional to 402.75 and 605.25 is: 909.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.75 : 605.25 = 605.25 : x
  2. Step 2: Convert to fraction form
    402.75/605.25 = 605.25/x
  3. Step 3: Cross multiply
    402.75x = 605.25 × 605.25
  4. Step 4: Simplify right side
    402.75x = 366,327.56
  5. Step 5: Solve for x
    x = 366,327.56/402.75
  6. Step 6: Final answer
    x = 909.57

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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.