Home / 1,968.08-2,716.92-1,222.40

Finding the Fourth Proportional to 1,968.08, 2,716.92 and 1,222.40

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Solution

The fourth proportional to 1,968.08, 2,716.92 and 1,222.40 is: 1,687.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.08 : 2,716.92 = 1,222.40 : x
  2. Step 2: Convert to fraction form
    1,968.08/2,716.92 = 1,222.40/x
  3. Step 3: Cross multiply
    1,968.08x = 2,716.92 × 1,222.40
  4. Step 4: Simplify right side
    1,968.08x = 3,321,163.01
  5. Step 5: Solve for x
    x = 3,321,163.01/1,968.08
  6. Step 6: Final answer
    x = 1,687.51

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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.