Home / 1,928.28-2,659.86-1,228.44

Finding the Fourth Proportional to 1,928.28, 2,659.86 and 1,228.44

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Solution

The fourth proportional to 1,928.28, 2,659.86 and 1,228.44 is: 1,694.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.28 : 2,659.86 = 1,228.44 : x
  2. Step 2: Convert to fraction form
    1,928.28/2,659.86 = 1,228.44/x
  3. Step 3: Cross multiply
    1,928.28x = 2,659.86 × 1,228.44
  4. Step 4: Simplify right side
    1,928.28x = 3,267,478.42
  5. Step 5: Solve for x
    x = 3,267,478.42/1,928.28
  6. Step 6: Final answer
    x = 1,694.50

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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.