Home / 1,968.12-2,716.08-1,222.49

Finding the Fourth Proportional to 1,968.12, 2,716.08 and 1,222.49

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Solution

The fourth proportional to 1,968.12, 2,716.08 and 1,222.49 is: 1,687.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.12 : 2,716.08 = 1,222.49 : x
  2. Step 2: Convert to fraction form
    1,968.12/2,716.08 = 1,222.49/x
  3. Step 3: Cross multiply
    1,968.12x = 2,716.08 × 1,222.49
  4. Step 4: Simplify right side
    1,968.12x = 3,320,360.95
  5. Step 5: Solve for x
    x = 3,320,360.95/1,968.12
  6. Step 6: Final answer
    x = 1,687.08

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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.