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Finding the Third Proportional to 128,840 and 274,796

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Solution

The third proportional to 128,840 and 274,796 is: 586,097.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,840 : 274,796 = 274,796 : x
  2. Step 2: Convert to fraction form
    128,840/274,796 = 274,796/x
  3. Step 3: Cross multiply
    128,840x = 274,796 × 274,796
  4. Step 4: Simplify right side
    128,840x = 75,512,841,616
  5. Step 5: Solve for x
    x = 75,512,841,616/128,840
  6. Step 6: Final answer
    x = 586,097.81

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.