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Finding the Third Proportional to 128,848 and 279,760

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Solution

The third proportional to 128,848 and 279,760 is: 607,426.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,848 : 279,760 = 279,760 : x
  2. Step 2: Convert to fraction form
    128,848/279,760 = 279,760/x
  3. Step 3: Cross multiply
    128,848x = 279,760 × 279,760
  4. Step 4: Simplify right side
    128,848x = 78,265,657,600
  5. Step 5: Solve for x
    x = 78,265,657,600/128,848
  6. Step 6: Final answer
    x = 607,426.25

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.