Home / 1,968.28-2,716.00-1,128.75

Finding the Fourth Proportional to 1,968.28, 2,716.00 and 1,128.75

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Solution

The fourth proportional to 1,968.28, 2,716.00 and 1,128.75 is: 1,557.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.28 : 2,716.00 = 1,128.75 : x
  2. Step 2: Convert to fraction form
    1,968.28/2,716.00 = 1,128.75/x
  3. Step 3: Cross multiply
    1,968.28x = 2,716.00 × 1,128.75
  4. Step 4: Simplify right side
    1,968.28x = 3,065,682.18
  5. Step 5: Solve for x
    x = 3,065,682.18/1,968.28
  6. Step 6: Final answer
    x = 1,557.55

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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.