Home / 2,028.28-2,798.79-1,188.42

Finding the Fourth Proportional to 2,028.28, 2,798.79 and 1,188.42

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Solution

The fourth proportional to 2,028.28, 2,798.79 and 1,188.42 is: 1,639.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,028.28 : 2,798.79 = 1,188.42 : x
  2. Step 2: Convert to fraction form
    2,028.28/2,798.79 = 1,188.42/x
  3. Step 3: Cross multiply
    2,028.28x = 2,798.79 × 1,188.42
  4. Step 4: Simplify right side
    2,028.28x = 3,326,138.01
  5. Step 5: Solve for x
    x = 3,326,138.01/2,028.28
  6. Step 6: Final answer
    x = 1,639.88

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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.