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Finding the Third Proportional to 128,524 and 272,600

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Solution

The third proportional to 128,524 and 272,600 is: 578,185.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,524 : 272,600 = 272,600 : x
  2. Step 2: Convert to fraction form
    128,524/272,600 = 272,600/x
  3. Step 3: Cross multiply
    128,524x = 272,600 × 272,600
  4. Step 4: Simplify right side
    128,524x = 74,310,760,000
  5. Step 5: Solve for x
    x = 74,310,760,000/128,524
  6. Step 6: Final answer
    x = 578,185.86

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.