Home / 1,961.11-2,705.91-1,122.09

Finding the Fourth Proportional to 1,961.11, 2,705.91 and 1,122.09

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Solution

The fourth proportional to 1,961.11, 2,705.91 and 1,122.09 is: 1,548.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.11 : 2,705.91 = 1,122.09 : x
  2. Step 2: Convert to fraction form
    1,961.11/2,705.91 = 1,122.09/x
  3. Step 3: Cross multiply
    1,961.11x = 2,705.91 × 1,122.09
  4. Step 4: Simplify right side
    1,961.11x = 3,036,260.20
  5. Step 5: Solve for x
    x = 3,036,260.20/1,961.11
  6. Step 6: Final answer
    x = 1,548.23

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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.