Home / 1,961.09-2,706.31-1,121.77

Finding the Fourth Proportional to 1,961.09, 2,706.31 and 1,121.77

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Solution

The fourth proportional to 1,961.09, 2,706.31 and 1,121.77 is: 1,548.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.09 : 2,706.31 = 1,121.77 : x
  2. Step 2: Convert to fraction form
    1,961.09/2,706.31 = 1,121.77/x
  3. Step 3: Cross multiply
    1,961.09x = 2,706.31 × 1,121.77
  4. Step 4: Simplify right side
    1,961.09x = 3,035,857.37
  5. Step 5: Solve for x
    x = 3,035,857.37/1,961.09
  6. Step 6: Final answer
    x = 1,548.05

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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.