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Finding the Third Proportional to 128,473.25 and 276,631.25

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Solution

The third proportional to 128,473.25 and 276,631.25 is: 595,648.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,473.25 : 276,631.25 = 276,631.25 : x
  2. Step 2: Convert to fraction form
    128,473.25/276,631.25 = 276,631.25/x
  3. Step 3: Cross multiply
    128,473.25x = 276,631.25 × 276,631.25
  4. Step 4: Simplify right side
    128,473.25x = 76,524,848,476.56
  5. Step 5: Solve for x
    x = 76,524,848,476.56/128,473.25
  6. Step 6: Final answer
    x = 595,648.11

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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.