Home / 1,998.20-2,993.70-1,688.60

Finding the Fourth Proportional to 1,998.20, 2,993.70 and 1,688.60

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Solution

The fourth proportional to 1,998.20, 2,993.70 and 1,688.60 is: 2,529.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.20 : 2,993.70 = 1,688.60 : x
  2. Step 2: Convert to fraction form
    1,998.20/2,993.70 = 1,688.60/x
  3. Step 3: Cross multiply
    1,998.20x = 2,993.70 × 1,688.60
  4. Step 4: Simplify right side
    1,998.20x = 5,055,161.82
  5. Step 5: Solve for x
    x = 5,055,161.82/1,998.20
  6. Step 6: Final answer
    x = 2,529.86

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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.