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Finding the Third Proportional to 321,486.50 and 687,262

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Solution

The third proportional to 321,486.50 and 687,262 is: 1,469,203.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,486.50 : 687,262 = 687,262 : x
  2. Step 2: Convert to fraction form
    321,486.50/687,262 = 687,262/x
  3. Step 3: Cross multiply
    321,486.50x = 687,262 × 687,262
  4. Step 4: Simplify right side
    321,486.50x = 472,329,056,644
  5. Step 5: Solve for x
    x = 472,329,056,644/321,486.50
  6. Step 6: Final answer
    x = 1,469,203.39

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.