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Finding the Fourth Proportional to 1,361.56, 2,039.08 and 1,087.88

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Solution

The fourth proportional to 1,361.56, 2,039.08 and 1,087.88 is: 1,629.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.56 : 2,039.08 = 1,087.88 : x
  2. Step 2: Convert to fraction form
    1,361.56/2,039.08 = 1,087.88/x
  3. Step 3: Cross multiply
    1,361.56x = 2,039.08 × 1,087.88
  4. Step 4: Simplify right side
    1,361.56x = 2,218,274.35
  5. Step 5: Solve for x
    x = 2,218,274.35/1,361.56
  6. Step 6: Final answer
    x = 1,629.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.