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Finding the Fourth Proportional to 399,067.73, 550,725.08 and 217,791.32

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Solution

The fourth proportional to 399,067.73, 550,725.08 and 217,791.32 is: 300,558.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,067.73 : 550,725.08 = 217,791.32 : x
  2. Step 2: Convert to fraction form
    399,067.73/550,725.08 = 217,791.32/x
  3. Step 3: Cross multiply
    399,067.73x = 550,725.08 × 217,791.32
  4. Step 4: Simplify right side
    399,067.73x = 119,943,141,041.35
  5. Step 5: Solve for x
    x = 119,943,141,041.35/399,067.73
  6. Step 6: Final answer
    x = 300,558.36

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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.