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Finding the Fourth Proportional to 1,361.26, 1,877.79 and 863.02

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Solution

The fourth proportional to 1,361.26, 1,877.79 and 863.02 is: 1,190.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.26 : 1,877.79 = 863.02 : x
  2. Step 2: Convert to fraction form
    1,361.26/1,877.79 = 863.02/x
  3. Step 3: Cross multiply
    1,361.26x = 1,877.79 × 863.02
  4. Step 4: Simplify right side
    1,361.26x = 1,620,570.33
  5. Step 5: Solve for x
    x = 1,620,570.33/1,361.26
  6. Step 6: Final answer
    x = 1,190.49

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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.