Home / 1,921.24-2,651.28-1,081.94

Finding the Fourth Proportional to 1,921.24, 2,651.28 and 1,081.94

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Solution

The fourth proportional to 1,921.24, 2,651.28 and 1,081.94 is: 1,493.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.24 : 2,651.28 = 1,081.94 : x
  2. Step 2: Convert to fraction form
    1,921.24/2,651.28 = 1,081.94/x
  3. Step 3: Cross multiply
    1,921.24x = 2,651.28 × 1,081.94
  4. Step 4: Simplify right side
    1,921.24x = 2,868,525.88
  5. Step 5: Solve for x
    x = 2,868,525.88/1,921.24
  6. Step 6: Final answer
    x = 1,493.06

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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.