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Finding the Third Proportional to 307,820 and 661,634

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Solution

The third proportional to 307,820 and 661,634 is: 1,422,128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,820 : 661,634 = 661,634 : x
  2. Step 2: Convert to fraction form
    307,820/661,634 = 661,634/x
  3. Step 3: Cross multiply
    307,820x = 661,634 × 661,634
  4. Step 4: Simplify right side
    307,820x = 437,759,549,956
  5. Step 5: Solve for x
    x = 437,759,549,956/307,820
  6. Step 6: Final answer
    x = 1,422,128.35

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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.