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Finding the Third Proportional to 209,322 and 436,356

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Solution

The third proportional to 209,322 and 436,356 is: 909,634.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,322 : 436,356 = 436,356 : x
  2. Step 2: Convert to fraction form
    209,322/436,356 = 436,356/x
  3. Step 3: Cross multiply
    209,322x = 436,356 × 436,356
  4. Step 4: Simplify right side
    209,322x = 190,406,558,736
  5. Step 5: Solve for x
    x = 190,406,558,736/209,322
  6. Step 6: Final answer
    x = 909,634.72

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.