Home / 1,906.21-2,853.92-1,211.15

Finding the Fourth Proportional to 1,906.21, 2,853.92 and 1,211.15

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Solution

The fourth proportional to 1,906.21, 2,853.92 and 1,211.15 is: 1,813.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.21 : 2,853.92 = 1,211.15 : x
  2. Step 2: Convert to fraction form
    1,906.21/2,853.92 = 1,211.15/x
  3. Step 3: Cross multiply
    1,906.21x = 2,853.92 × 1,211.15
  4. Step 4: Simplify right side
    1,906.21x = 3,456,530.83
  5. Step 5: Solve for x
    x = 3,456,530.83/1,906.21
  6. Step 6: Final answer
    x = 1,813.30

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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.