Home / 3,787.20-5,679.99-1,188.72

Finding the Fourth Proportional to 3,787.20, 5,679.99 and 1,188.72

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Solution

The fourth proportional to 3,787.20, 5,679.99 and 1,188.72 is: 1,782.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,787.20 : 5,679.99 = 1,188.72 : x
  2. Step 2: Convert to fraction form
    3,787.20/5,679.99 = 1,188.72/x
  3. Step 3: Cross multiply
    3,787.20x = 5,679.99 × 1,188.72
  4. Step 4: Simplify right side
    3,787.20x = 6,751,917.71
  5. Step 5: Solve for x
    x = 6,751,917.71/3,787.20
  6. Step 6: Final answer
    x = 1,782.83

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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.