Home / 1,917.25-2,645.82-1,255.21

Finding the Fourth Proportional to 1,917.25, 2,645.82 and 1,255.21

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Solution

The fourth proportional to 1,917.25, 2,645.82 and 1,255.21 is: 1,732.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.25 : 2,645.82 = 1,255.21 : x
  2. Step 2: Convert to fraction form
    1,917.25/2,645.82 = 1,255.21/x
  3. Step 3: Cross multiply
    1,917.25x = 2,645.82 × 1,255.21
  4. Step 4: Simplify right side
    1,917.25x = 3,321,059.72
  5. Step 5: Solve for x
    x = 3,321,059.72/1,917.25
  6. Step 6: Final answer
    x = 1,732.20

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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.