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Finding the Third Proportional to 128,556 and 276,795.75

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Solution

The third proportional to 128,556 and 276,795.75 is: 595,972.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,556 : 276,795.75 = 276,795.75 : x
  2. Step 2: Convert to fraction form
    128,556/276,795.75 = 276,795.75/x
  3. Step 3: Cross multiply
    128,556x = 276,795.75 × 276,795.75
  4. Step 4: Simplify right side
    128,556x = 76,615,887,218.06
  5. Step 5: Solve for x
    x = 76,615,887,218.06/128,556
  6. Step 6: Final answer
    x = 595,972.86

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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.