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Finding the Third Proportional to 138,520 and 303,314

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Solution

The third proportional to 138,520 and 303,314 is: 664,159.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,520 : 303,314 = 303,314 : x
  2. Step 2: Convert to fraction form
    138,520/303,314 = 303,314/x
  3. Step 3: Cross multiply
    138,520x = 303,314 × 303,314
  4. Step 4: Simplify right side
    138,520x = 91,999,382,596
  5. Step 5: Solve for x
    x = 91,999,382,596/138,520
  6. Step 6: Final answer
    x = 664,159.56

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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.