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Finding the Fourth Proportional to 451,279.26, 622,367.90 and 279,169.89

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Solution

The fourth proportional to 451,279.26, 622,367.90 and 279,169.89 is: 385,008.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,279.26 : 622,367.90 = 279,169.89 : x
  2. Step 2: Convert to fraction form
    451,279.26/622,367.90 = 279,169.89/x
  3. Step 3: Cross multiply
    451,279.26x = 622,367.90 × 279,169.89
  4. Step 4: Simplify right side
    451,279.26x = 173,746,376,786.68
  5. Step 5: Solve for x
    x = 173,746,376,786.68/451,279.26
  6. Step 6: Final answer
    x = 385,008.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.