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Finding the Third Proportional to 151,449 and 220,121

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Solution

The third proportional to 151,449 and 220,121 is: 319,931.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,449 : 220,121 = 220,121 : x
  2. Step 2: Convert to fraction form
    151,449/220,121 = 220,121/x
  3. Step 3: Cross multiply
    151,449x = 220,121 × 220,121
  4. Step 4: Simplify right side
    151,449x = 48,453,254,641
  5. Step 5: Solve for x
    x = 48,453,254,641/151,449
  6. Step 6: Final answer
    x = 319,931.16

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.