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Finding the Fourth Proportional to 1,361.25, 2,040.93 and 874.04

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Solution

The fourth proportional to 1,361.25, 2,040.93 and 874.04 is: 1,310.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.25 : 2,040.93 = 874.04 : x
  2. Step 2: Convert to fraction form
    1,361.25/2,040.93 = 874.04/x
  3. Step 3: Cross multiply
    1,361.25x = 2,040.93 × 874.04
  4. Step 4: Simplify right side
    1,361.25x = 1,783,844.25
  5. Step 5: Solve for x
    x = 1,783,844.25/1,361.25
  6. Step 6: Final answer
    x = 1,310.45

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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.