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Finding the Fourth Proportional to 5,181.75, 7,772.65 and 1,719

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Solution

The fourth proportional to 5,181.75, 7,772.65 and 1,719 is: 2,578.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.75 : 7,772.65 = 1,719 : x
  2. Step 2: Convert to fraction form
    5,181.75/7,772.65 = 1,719/x
  3. Step 3: Cross multiply
    5,181.75x = 7,772.65 × 1,719
  4. Step 4: Simplify right side
    5,181.75x = 13,361,181.05
  5. Step 5: Solve for x
    x = 13,361,181.05/5,181.75
  6. Step 6: Final answer
    x = 2,578.51

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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.