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Finding the Third Proportional to 438,644 and 642,756

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Solution

The third proportional to 438,644 and 642,756 is: 941,846.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,644 : 642,756 = 642,756 : x
  2. Step 2: Convert to fraction form
    438,644/642,756 = 642,756/x
  3. Step 3: Cross multiply
    438,644x = 642,756 × 642,756
  4. Step 4: Simplify right side
    438,644x = 413,135,275,536
  5. Step 5: Solve for x
    x = 413,135,275,536/438,644
  6. Step 6: Final answer
    x = 941,846.41

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.