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Finding the Third Proportional to 312,012 and 445,868

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Solution

The third proportional to 312,012 and 445,868 is: 637,149.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,012 : 445,868 = 445,868 : x
  2. Step 2: Convert to fraction form
    312,012/445,868 = 445,868/x
  3. Step 3: Cross multiply
    312,012x = 445,868 × 445,868
  4. Step 4: Simplify right side
    312,012x = 198,798,273,424
  5. Step 5: Solve for x
    x = 198,798,273,424/312,012
  6. Step 6: Final answer
    x = 637,149.45

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.