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Finding the Third Proportional to 122,816 and 220,360

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Solution

The third proportional to 122,816 and 220,360 is: 395,376.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,816 : 220,360 = 220,360 : x
  2. Step 2: Convert to fraction form
    122,816/220,360 = 220,360/x
  3. Step 3: Cross multiply
    122,816x = 220,360 × 220,360
  4. Step 4: Simplify right side
    122,816x = 48,558,529,600
  5. Step 5: Solve for x
    x = 48,558,529,600/122,816
  6. Step 6: Final answer
    x = 395,376.25

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.