Home / 2,146.82-3,219.74-1,281.38

Finding the Fourth Proportional to 2,146.82, 3,219.74 and 1,281.38

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Solution

The fourth proportional to 2,146.82, 3,219.74 and 1,281.38 is: 1,921.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,146.82 : 3,219.74 = 1,281.38 : x
  2. Step 2: Convert to fraction form
    2,146.82/3,219.74 = 1,281.38/x
  3. Step 3: Cross multiply
    2,146.82x = 3,219.74 × 1,281.38
  4. Step 4: Simplify right side
    2,146.82x = 4,125,710.44
  5. Step 5: Solve for x
    x = 4,125,710.44/2,146.82
  6. Step 6: Final answer
    x = 1,921.78

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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.