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Finding the Third Proportional to 420.38 and 996.94

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Solution

The third proportional to 420.38 and 996.94 is: 2,364.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.38 : 996.94 = 996.94 : x
  2. Step 2: Convert to fraction form
    420.38/996.94 = 996.94/x
  3. Step 3: Cross multiply
    420.38x = 996.94 × 996.94
  4. Step 4: Simplify right side
    420.38x = 993,884.38
  5. Step 5: Solve for x
    x = 993,884.38/420.38
  6. Step 6: Final answer
    x = 2,364.28

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.