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Finding the Third Proportional to 428,224 and 922,220

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Solution

The third proportional to 428,224 and 922,220 is: 1,986,086.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,224 : 922,220 = 922,220 : x
  2. Step 2: Convert to fraction form
    428,224/922,220 = 922,220/x
  3. Step 3: Cross multiply
    428,224x = 922,220 × 922,220
  4. Step 4: Simplify right side
    428,224x = 850,489,728,400
  5. Step 5: Solve for x
    x = 850,489,728,400/428,224
  6. Step 6: Final answer
    x = 1,986,086.09

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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.