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Finding the Third Proportional to 212,382 and 320,211

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Solution

The third proportional to 212,382 and 320,211 is: 482,786.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,382 : 320,211 = 320,211 : x
  2. Step 2: Convert to fraction form
    212,382/320,211 = 320,211/x
  3. Step 3: Cross multiply
    212,382x = 320,211 × 320,211
  4. Step 4: Simplify right side
    212,382x = 102,535,084,521
  5. Step 5: Solve for x
    x = 102,535,084,521/212,382
  6. Step 6: Final answer
    x = 482,786.13

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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.