Home / 2,107.78-2,908.80-1,163.60

Finding the Fourth Proportional to 2,107.78, 2,908.80 and 1,163.60

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Solution

The fourth proportional to 2,107.78, 2,908.80 and 1,163.60 is: 1,605.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.78 : 2,908.80 = 1,163.60 : x
  2. Step 2: Convert to fraction form
    2,107.78/2,908.80 = 1,163.60/x
  3. Step 3: Cross multiply
    2,107.78x = 2,908.80 × 1,163.60
  4. Step 4: Simplify right side
    2,107.78x = 3,384,679.68
  5. Step 5: Solve for x
    x = 3,384,679.68/2,107.78
  6. Step 6: Final answer
    x = 1,605.80

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1.5x scale

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.