Home / 1,921.28-2,651.80-1,361.16

Finding the Fourth Proportional to 1,921.28, 2,651.80 and 1,361.16

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Solution

The fourth proportional to 1,921.28, 2,651.80 and 1,361.16 is: 1,878.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.28 : 2,651.80 = 1,361.16 : x
  2. Step 2: Convert to fraction form
    1,921.28/2,651.80 = 1,361.16/x
  3. Step 3: Cross multiply
    1,921.28x = 2,651.80 × 1,361.16
  4. Step 4: Simplify right side
    1,921.28x = 3,609,524.09
  5. Step 5: Solve for x
    x = 3,609,524.09/1,921.28
  6. Step 6: Final answer
    x = 1,878.71

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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.