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Finding the Third Proportional to 406.74 and 842.43

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Solution

The third proportional to 406.74 and 842.43 is: 1,744.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.74 : 842.43 = 842.43 : x
  2. Step 2: Convert to fraction form
    406.74/842.43 = 842.43/x
  3. Step 3: Cross multiply
    406.74x = 842.43 × 842.43
  4. Step 4: Simplify right side
    406.74x = 709,691.07
  5. Step 5: Solve for x
    x = 709,691.07/406.74
  6. Step 6: Final answer
    x = 1,744.83

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.