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Finding the Fourth Proportional to 399,279.06, 550,996.67 and 217,982.22

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Solution

The fourth proportional to 399,279.06, 550,996.67 and 217,982.22 is: 300,810.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,279.06 : 550,996.67 = 217,982.22 : x
  2. Step 2: Convert to fraction form
    399,279.06/550,996.67 = 217,982.22/x
  3. Step 3: Cross multiply
    399,279.06x = 550,996.67 × 217,982.22
  4. Step 4: Simplify right side
    399,279.06x = 120,107,476,249.30
  5. Step 5: Solve for x
    x = 120,107,476,249.30/399,279.06
  6. Step 6: Final answer
    x = 300,810.86

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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.