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Finding the Third Proportional to 209,328 and 436,368

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Solution

The third proportional to 209,328 and 436,368 is: 909,658.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,328 : 436,368 = 436,368 : x
  2. Step 2: Convert to fraction form
    209,328/436,368 = 436,368/x
  3. Step 3: Cross multiply
    209,328x = 436,368 × 436,368
  4. Step 4: Simplify right side
    209,328x = 190,417,031,424
  5. Step 5: Solve for x
    x = 190,417,031,424/209,328
  6. Step 6: Final answer
    x = 909,658.68

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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.