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Finding the Third Proportional to 517,212 and 772,686

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Solution

The third proportional to 517,212 and 772,686 is: 1,154,349.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,212 : 772,686 = 772,686 : x
  2. Step 2: Convert to fraction form
    517,212/772,686 = 772,686/x
  3. Step 3: Cross multiply
    517,212x = 772,686 × 772,686
  4. Step 4: Simplify right side
    517,212x = 597,043,654,596
  5. Step 5: Solve for x
    x = 597,043,654,596/517,212
  6. Step 6: Final answer
    x = 1,154,349.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.