Home / 1,921.06-2,651.11-1,081.79

Finding the Fourth Proportional to 1,921.06, 2,651.11 and 1,081.79

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Solution

The fourth proportional to 1,921.06, 2,651.11 and 1,081.79 is: 1,492.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.06 : 2,651.11 = 1,081.79 : x
  2. Step 2: Convert to fraction form
    1,921.06/2,651.11 = 1,081.79/x
  3. Step 3: Cross multiply
    1,921.06x = 2,651.11 × 1,081.79
  4. Step 4: Simplify right side
    1,921.06x = 2,867,944.29
  5. Step 5: Solve for x
    x = 2,867,944.29/1,921.06
  6. Step 6: Final answer
    x = 1,492.90

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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.