Home / 1,286.67-1,928.37-1,072.83

Finding the Fourth Proportional to 1,286.67, 1,928.37 and 1,072.83

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Solution

The fourth proportional to 1,286.67, 1,928.37 and 1,072.83 is: 1,607.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.67 : 1,928.37 = 1,072.83 : x
  2. Step 2: Convert to fraction form
    1,286.67/1,928.37 = 1,072.83/x
  3. Step 3: Cross multiply
    1,286.67x = 1,928.37 × 1,072.83
  4. Step 4: Simplify right side
    1,286.67x = 2,068,813.19
  5. Step 5: Solve for x
    x = 2,068,813.19/1,286.67
  6. Step 6: Final answer
    x = 1,607.88

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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.