Home / 1,961.82-2,709.50-1,331.25

Finding the Fourth Proportional to 1,961.82, 2,709.50 and 1,331.25

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Solution

The fourth proportional to 1,961.82, 2,709.50 and 1,331.25 is: 1,838.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.82 : 2,709.50 = 1,331.25 : x
  2. Step 2: Convert to fraction form
    1,961.82/2,709.50 = 1,331.25/x
  3. Step 3: Cross multiply
    1,961.82x = 2,709.50 × 1,331.25
  4. Step 4: Simplify right side
    1,961.82x = 3,607,021.88
  5. Step 5: Solve for x
    x = 3,607,021.88/1,961.82
  6. Step 6: Final answer
    x = 1,838.61

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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.