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Finding the Fourth Proportional to 3,361.86, 5,040.08 and 1,281.44

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Solution

The fourth proportional to 3,361.86, 5,040.08 and 1,281.44 is: 1,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,361.86 : 5,040.08 = 1,281.44 : x
  2. Step 2: Convert to fraction form
    3,361.86/5,040.08 = 1,281.44/x
  3. Step 3: Cross multiply
    3,361.86x = 5,040.08 × 1,281.44
  4. Step 4: Simplify right side
    3,361.86x = 6,458,560.12
  5. Step 5: Solve for x
    x = 6,458,560.12/3,361.86
  6. Step 6: Final answer
    x = 1,921.13

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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.