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Finding the Third Proportional to 392,220 and 552,320

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Solution

The third proportional to 392,220 and 552,320 is: 777,771.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,220 : 552,320 = 552,320 : x
  2. Step 2: Convert to fraction form
    392,220/552,320 = 552,320/x
  3. Step 3: Cross multiply
    392,220x = 552,320 × 552,320
  4. Step 4: Simplify right side
    392,220x = 305,057,382,400
  5. Step 5: Solve for x
    x = 305,057,382,400/392,220
  6. Step 6: Final answer
    x = 777,771.10

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.