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Finding the Fourth Proportional to 1,454.90, 2,007.74 and 791.74

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Solution

The fourth proportional to 1,454.90, 2,007.74 and 791.74 is: 1,092.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,454.90 : 2,007.74 = 791.74 : x
  2. Step 2: Convert to fraction form
    1,454.90/2,007.74 = 791.74/x
  3. Step 3: Cross multiply
    1,454.90x = 2,007.74 × 791.74
  4. Step 4: Simplify right side
    1,454.90x = 1,589,608.07
  5. Step 5: Solve for x
    x = 1,589,608.07/1,454.90
  6. Step 6: Final answer
    x = 1,092.59

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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.