Home / 2,065.12-3,099.66-1,286.60

Finding the Fourth Proportional to 2,065.12, 3,099.66 and 1,286.60

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Solution

The fourth proportional to 2,065.12, 3,099.66 and 1,286.60 is: 1,931.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,065.12 : 3,099.66 = 1,286.60 : x
  2. Step 2: Convert to fraction form
    2,065.12/3,099.66 = 1,286.60/x
  3. Step 3: Cross multiply
    2,065.12x = 3,099.66 × 1,286.60
  4. Step 4: Simplify right side
    2,065.12x = 3,988,022.56
  5. Step 5: Solve for x
    x = 3,988,022.56/2,065.12
  6. Step 6: Final answer
    x = 1,931.13

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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.