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Finding the Third Proportional to 297,984 and 638,616

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Solution

The third proportional to 297,984 and 638,616 is: 1,368,631.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,984 : 638,616 = 638,616 : x
  2. Step 2: Convert to fraction form
    297,984/638,616 = 638,616/x
  3. Step 3: Cross multiply
    297,984x = 638,616 × 638,616
  4. Step 4: Simplify right side
    297,984x = 407,830,395,456
  5. Step 5: Solve for x
    x = 407,830,395,456/297,984
  6. Step 6: Final answer
    x = 1,368,631.86

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.