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Finding the Third Proportional to 307,912 and 661,664

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Solution

The third proportional to 307,912 and 661,664 is: 1,421,832.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,912 : 661,664 = 661,664 : x
  2. Step 2: Convert to fraction form
    307,912/661,664 = 661,664/x
  3. Step 3: Cross multiply
    307,912x = 661,664 × 661,664
  4. Step 4: Simplify right side
    307,912x = 437,799,248,896
  5. Step 5: Solve for x
    x = 437,799,248,896/307,912
  6. Step 6: Final answer
    x = 1,421,832.37

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.