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Finding the Third Proportional to 396,436 and 565,129

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Solution

The third proportional to 396,436 and 565,129 is: 805,604.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,436 : 565,129 = 565,129 : x
  2. Step 2: Convert to fraction form
    396,436/565,129 = 565,129/x
  3. Step 3: Cross multiply
    396,436x = 565,129 × 565,129
  4. Step 4: Simplify right side
    396,436x = 319,370,786,641
  5. Step 5: Solve for x
    x = 319,370,786,641/396,436
  6. Step 6: Final answer
    x = 805,604.91

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.