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Finding the Fourth Proportional to 399,068.23, 550,725.77 and 217,791.82

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Solution

The fourth proportional to 399,068.23, 550,725.77 and 217,791.82 is: 300,559.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,068.23 : 550,725.77 = 217,791.82 : x
  2. Step 2: Convert to fraction form
    399,068.23/550,725.77 = 217,791.82/x
  3. Step 3: Cross multiply
    399,068.23x = 550,725.77 × 217,791.82
  4. Step 4: Simplify right side
    399,068.23x = 119,943,567,769.20
  5. Step 5: Solve for x
    x = 119,943,567,769.20/399,068.23
  6. Step 6: Final answer
    x = 300,559.05

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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.