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Finding the Third Proportional to 400,848 and 644,715

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Solution

The third proportional to 400,848 and 644,715 is: 1,036,945.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,848 : 644,715 = 644,715 : x
  2. Step 2: Convert to fraction form
    400,848/644,715 = 644,715/x
  3. Step 3: Cross multiply
    400,848x = 644,715 × 644,715
  4. Step 4: Simplify right side
    400,848x = 415,657,431,225
  5. Step 5: Solve for x
    x = 415,657,431,225/400,848
  6. Step 6: Final answer
    x = 1,036,945.25

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.