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Finding the Third Proportional to 636.19 and 903.38

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Solution

The third proportional to 636.19 and 903.38 is: 1,282.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.19 : 903.38 = 903.38 : x
  2. Step 2: Convert to fraction form
    636.19/903.38 = 903.38/x
  3. Step 3: Cross multiply
    636.19x = 903.38 × 903.38
  4. Step 4: Simplify right side
    636.19x = 816,086.39
  5. Step 5: Solve for x
    x = 816,086.39/636.19
  6. Step 6: Final answer
    x = 1,282.78

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.