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Finding the Third Proportional to 396.25 and 603.50

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Solution

The third proportional to 396.25 and 603.50 is: 919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.25 : 603.50 = 603.50 : x
  2. Step 2: Convert to fraction form
    396.25/603.50 = 603.50/x
  3. Step 3: Cross multiply
    396.25x = 603.50 × 603.50
  4. Step 4: Simplify right side
    396.25x = 364,212.25
  5. Step 5: Solve for x
    x = 364,212.25/396.25
  6. Step 6: Final answer
    x = 919.15

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.