Home / 2,660.61-3,991.32-1,200.18

Finding the Fourth Proportional to 2,660.61, 3,991.32 and 1,200.18

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Solution

The fourth proportional to 2,660.61, 3,991.32 and 1,200.18 is: 1,800.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.61 : 3,991.32 = 1,200.18 : x
  2. Step 2: Convert to fraction form
    2,660.61/3,991.32 = 1,200.18/x
  3. Step 3: Cross multiply
    2,660.61x = 3,991.32 × 1,200.18
  4. Step 4: Simplify right side
    2,660.61x = 4,790,302.44
  5. Step 5: Solve for x
    x = 4,790,302.44/2,660.61
  6. Step 6: Final answer
    x = 1,800.45

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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.