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Finding the Third Proportional to 297,078 and 641,505

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Solution

The third proportional to 297,078 and 641,505 is: 1,385,254.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,078 : 641,505 = 641,505 : x
  2. Step 2: Convert to fraction form
    297,078/641,505 = 641,505/x
  3. Step 3: Cross multiply
    297,078x = 641,505 × 641,505
  4. Step 4: Simplify right side
    297,078x = 411,528,665,025
  5. Step 5: Solve for x
    x = 411,528,665,025/297,078
  6. Step 6: Final answer
    x = 1,385,254.60

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.