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Finding the Third Proportional to 128,385 and 262,251

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Solution

The third proportional to 128,385 and 262,251 is: 535,697.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,385 : 262,251 = 262,251 : x
  2. Step 2: Convert to fraction form
    128,385/262,251 = 262,251/x
  3. Step 3: Cross multiply
    128,385x = 262,251 × 262,251
  4. Step 4: Simplify right side
    128,385x = 68,775,587,001
  5. Step 5: Solve for x
    x = 68,775,587,001/128,385
  6. Step 6: Final answer
    x = 535,697.99

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.