Home / 2,191.92-3,286.80-1,267.20

Finding the Fourth Proportional to 2,191.92, 3,286.80 and 1,267.20

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Solution

The fourth proportional to 2,191.92, 3,286.80 and 1,267.20 is: 1,900.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.92 : 3,286.80 = 1,267.20 : x
  2. Step 2: Convert to fraction form
    2,191.92/3,286.80 = 1,267.20/x
  3. Step 3: Cross multiply
    2,191.92x = 3,286.80 × 1,267.20
  4. Step 4: Simplify right side
    2,191.92x = 4,165,032.96
  5. Step 5: Solve for x
    x = 4,165,032.96/2,191.92
  6. Step 6: Final answer
    x = 1,900.18

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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.