Home / 2,219.67-3,063.38-1,288.11

Finding the Fourth Proportional to 2,219.67, 3,063.38 and 1,288.11

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Solution

The fourth proportional to 2,219.67, 3,063.38 and 1,288.11 is: 1,777.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.67 : 3,063.38 = 1,288.11 : x
  2. Step 2: Convert to fraction form
    2,219.67/3,063.38 = 1,288.11/x
  3. Step 3: Cross multiply
    2,219.67x = 3,063.38 × 1,288.11
  4. Step 4: Simplify right side
    2,219.67x = 3,945,963.97
  5. Step 5: Solve for x
    x = 3,945,963.97/2,219.67
  6. Step 6: Final answer
    x = 1,777.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.