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Finding the Fourth Proportional to 371,791.26, 557,687.43 and 91,308.78

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Solution

The fourth proportional to 371,791.26, 557,687.43 and 91,308.78 is: 136,963.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,791.26 : 557,687.43 = 91,308.78 : x
  2. Step 2: Convert to fraction form
    371,791.26/557,687.43 = 91,308.78/x
  3. Step 3: Cross multiply
    371,791.26x = 557,687.43 × 91,308.78
  4. Step 4: Simplify right side
    371,791.26x = 50,921,758,854.64
  5. Step 5: Solve for x
    x = 50,921,758,854.64/371,791.26
  6. Step 6: Final answer
    x = 136,963.30

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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.