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Finding the Third Proportional to 211,644 and 288,218

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Solution

The third proportional to 211,644 and 288,218 is: 392,496.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,644 : 288,218 = 288,218 : x
  2. Step 2: Convert to fraction form
    211,644/288,218 = 288,218/x
  3. Step 3: Cross multiply
    211,644x = 288,218 × 288,218
  4. Step 4: Simplify right side
    211,644x = 83,069,615,524
  5. Step 5: Solve for x
    x = 83,069,615,524/211,644
  6. Step 6: Final answer
    x = 392,496.91

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.