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Finding the Fourth Proportional to 2,660.68, 3,991.86 and 1,199.52

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Solution

The fourth proportional to 2,660.68, 3,991.86 and 1,199.52 is: 1,799.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.68 : 3,991.86 = 1,199.52 : x
  2. Step 2: Convert to fraction form
    2,660.68/3,991.86 = 1,199.52/x
  3. Step 3: Cross multiply
    2,660.68x = 3,991.86 × 1,199.52
  4. Step 4: Simplify right side
    2,660.68x = 4,788,315.91
  5. Step 5: Solve for x
    x = 4,788,315.91/2,660.68
  6. Step 6: Final answer
    x = 1,799.66

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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.