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Finding the Fourth Proportional to 5,380.42, 8,072.94 and 2,917

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Solution

The fourth proportional to 5,380.42, 8,072.94 and 2,917 is: 4,376.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,380.42 : 8,072.94 = 2,917 : x
  2. Step 2: Convert to fraction form
    5,380.42/8,072.94 = 2,917/x
  3. Step 3: Cross multiply
    5,380.42x = 8,072.94 × 2,917
  4. Step 4: Simplify right side
    5,380.42x = 23,548,765.98
  5. Step 5: Solve for x
    x = 23,548,765.98/5,380.42
  6. Step 6: Final answer
    x = 4,376.75

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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.