Home / 2,185.11-3,015.46-1,288.87

Finding the Fourth Proportional to 2,185.11, 3,015.46 and 1,288.87

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Solution

The fourth proportional to 2,185.11, 3,015.46 and 1,288.87 is: 1,778.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.11 : 3,015.46 = 1,288.87 : x
  2. Step 2: Convert to fraction form
    2,185.11/3,015.46 = 1,288.87/x
  3. Step 3: Cross multiply
    2,185.11x = 3,015.46 × 1,288.87
  4. Step 4: Simplify right side
    2,185.11x = 3,886,535.93
  5. Step 5: Solve for x
    x = 3,886,535.93/2,185.11
  6. Step 6: Final answer
    x = 1,778.65

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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.