Home / 2,163.77-2,985.98-1,268.09

Finding the Fourth Proportional to 2,163.77, 2,985.98 and 1,268.09

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Solution

The fourth proportional to 2,163.77, 2,985.98 and 1,268.09 is: 1,749.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.77 : 2,985.98 = 1,268.09 : x
  2. Step 2: Convert to fraction form
    2,163.77/2,985.98 = 1,268.09/x
  3. Step 3: Cross multiply
    2,163.77x = 2,985.98 × 1,268.09
  4. Step 4: Simplify right side
    2,163.77x = 3,786,470.11
  5. Step 5: Solve for x
    x = 3,786,470.11/2,163.77
  6. Step 6: Final answer
    x = 1,749.95

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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.