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Finding the Third Proportional to 431 and 923

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Solution

The third proportional to 431 and 923 is: 1,976.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    431 : 923 = 923 : x
  2. Step 2: Convert to fraction form
    431/923 = 923/x
  3. Step 3: Cross multiply
    431x = 923 × 923
  4. Step 4: Simplify right side
    431x = 851,929
  5. Step 5: Solve for x
    x = 851,929/431
  6. Step 6: Final answer
    x = 1,976.63

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.