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Finding the Third Proportional to 420,090 and 921,828

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Solution

The third proportional to 420,090 and 921,828 is: 2,022,820.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,090 : 921,828 = 921,828 : x
  2. Step 2: Convert to fraction form
    420,090/921,828 = 921,828/x
  3. Step 3: Cross multiply
    420,090x = 921,828 × 921,828
  4. Step 4: Simplify right side
    420,090x = 849,766,861,584
  5. Step 5: Solve for x
    x = 849,766,861,584/420,090
  6. Step 6: Final answer
    x = 2,022,820.97

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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.