Home / 2,660.12-3,990.17-1,199.69

Finding the Fourth Proportional to 2,660.12, 3,990.17 and 1,199.69

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Solution

The fourth proportional to 2,660.12, 3,990.17 and 1,199.69 is: 1,799.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.12 : 3,990.17 = 1,199.69 : x
  2. Step 2: Convert to fraction form
    2,660.12/3,990.17 = 1,199.69/x
  3. Step 3: Cross multiply
    2,660.12x = 3,990.17 × 1,199.69
  4. Step 4: Simplify right side
    2,660.12x = 4,786,950.10
  5. Step 5: Solve for x
    x = 4,786,950.10/2,660.12
  6. Step 6: Final answer
    x = 1,799.53

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Double scale
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Similar ratio
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1.5x scale

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.