Home / 1,921.36-2,648.29-1,361.11

Finding the Fourth Proportional to 1,921.36, 2,648.29 and 1,361.11

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Solution

The fourth proportional to 1,921.36, 2,648.29 and 1,361.11 is: 1,876.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.36 : 2,648.29 = 1,361.11 : x
  2. Step 2: Convert to fraction form
    1,921.36/2,648.29 = 1,361.11/x
  3. Step 3: Cross multiply
    1,921.36x = 2,648.29 × 1,361.11
  4. Step 4: Simplify right side
    1,921.36x = 3,604,608.94
  5. Step 5: Solve for x
    x = 3,604,608.94/1,921.36
  6. Step 6: Final answer
    x = 1,876.07

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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.