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Finding the Fourth Proportional to 343,743.82, 515,640.57 and 143,863.09

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Solution

The fourth proportional to 343,743.82, 515,640.57 and 143,863.09 is: 215,805.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,743.82 : 515,640.57 = 143,863.09 : x
  2. Step 2: Convert to fraction form
    343,743.82/515,640.57 = 143,863.09/x
  3. Step 3: Cross multiply
    343,743.82x = 515,640.57 × 143,863.09
  4. Step 4: Simplify right side
    343,743.82x = 74,181,645,729.56
  5. Step 5: Solve for x
    x = 74,181,645,729.56/343,743.82
  6. Step 6: Final answer
    x = 215,805.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.