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Finding the Third Proportional to 420,156 and 921,947

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Solution

The third proportional to 420,156 and 921,947 is: 2,023,025.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,156 : 921,947 = 921,947 : x
  2. Step 2: Convert to fraction form
    420,156/921,947 = 921,947/x
  3. Step 3: Cross multiply
    420,156x = 921,947 × 921,947
  4. Step 4: Simplify right side
    420,156x = 849,986,270,809
  5. Step 5: Solve for x
    x = 849,986,270,809/420,156
  6. Step 6: Final answer
    x = 2,023,025.43

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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.