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Finding the Third Proportional to 420,171 and 921,972

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Solution

The third proportional to 420,171 and 921,972 is: 2,023,062.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,171 : 921,972 = 921,972 : x
  2. Step 2: Convert to fraction form
    420,171/921,972 = 921,972/x
  3. Step 3: Cross multiply
    420,171x = 921,972 × 921,972
  4. Step 4: Simplify right side
    420,171x = 850,032,368,784
  5. Step 5: Solve for x
    x = 850,032,368,784/420,171
  6. Step 6: Final answer
    x = 2,023,062.92

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.