Home / 2,219.92-3,063.72-1,288.36

Finding the Fourth Proportional to 2,219.92, 3,063.72 and 1,288.36

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Solution

The fourth proportional to 2,219.92, 3,063.72 and 1,288.36 is: 1,778.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.92 : 3,063.72 = 1,288.36 : x
  2. Step 2: Convert to fraction form
    2,219.92/3,063.72 = 1,288.36/x
  3. Step 3: Cross multiply
    2,219.92x = 3,063.72 × 1,288.36
  4. Step 4: Simplify right side
    2,219.92x = 3,947,174.30
  5. Step 5: Solve for x
    x = 3,947,174.30/2,219.92
  6. Step 6: Final answer
    x = 1,778.07

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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.