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Finding the Fourth Proportional to 641,791.44, 885,638.43 and 351,347.31

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Solution

The fourth proportional to 641,791.44, 885,638.43 and 351,347.31 is: 484,840.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,791.44 : 885,638.43 = 351,347.31 : x
  2. Step 2: Convert to fraction form
    641,791.44/885,638.43 = 351,347.31/x
  3. Step 3: Cross multiply
    641,791.44x = 885,638.43 × 351,347.31
  4. Step 4: Simplify right side
    641,791.44x = 311,166,680,013.12
  5. Step 5: Solve for x
    x = 311,166,680,013.12/641,791.44
  6. Step 6: Final answer
    x = 484,840.81

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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.