Home / 1,921.22-2,651.18-1,081.96

Finding the Fourth Proportional to 1,921.22, 2,651.18 and 1,081.96

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Solution

The fourth proportional to 1,921.22, 2,651.18 and 1,081.96 is: 1,493.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.22 : 2,651.18 = 1,081.96 : x
  2. Step 2: Convert to fraction form
    1,921.22/2,651.18 = 1,081.96/x
  3. Step 3: Cross multiply
    1,921.22x = 2,651.18 × 1,081.96
  4. Step 4: Simplify right side
    1,921.22x = 2,868,470.71
  5. Step 5: Solve for x
    x = 2,868,470.71/1,921.22
  6. Step 6: Final answer
    x = 1,493.05

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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.