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Finding the Third Proportional to 285,392 and 423,972

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Solution

The third proportional to 285,392 and 423,972 is: 629,843.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,392 : 423,972 = 423,972 : x
  2. Step 2: Convert to fraction form
    285,392/423,972 = 423,972/x
  3. Step 3: Cross multiply
    285,392x = 423,972 × 423,972
  4. Step 4: Simplify right side
    285,392x = 179,752,256,784
  5. Step 5: Solve for x
    x = 179,752,256,784/285,392
  6. Step 6: Final answer
    x = 629,843.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.