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Finding the Third Proportional to 215,556 and 326,318

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Solution

The third proportional to 215,556 and 326,318 is: 493,994.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,556 : 326,318 = 326,318 : x
  2. Step 2: Convert to fraction form
    215,556/326,318 = 326,318/x
  3. Step 3: Cross multiply
    215,556x = 326,318 × 326,318
  4. Step 4: Simplify right side
    215,556x = 106,483,437,124
  5. Step 5: Solve for x
    x = 106,483,437,124/215,556
  6. Step 6: Final answer
    x = 493,994.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.