Home / 1,928.10-2,660.13-1,229.88

Finding the Fourth Proportional to 1,928.10, 2,660.13 and 1,229.88

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Solution

The fourth proportional to 1,928.10, 2,660.13 and 1,229.88 is: 1,696.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.10 : 2,660.13 = 1,229.88 : x
  2. Step 2: Convert to fraction form
    1,928.10/2,660.13 = 1,229.88/x
  3. Step 3: Cross multiply
    1,928.10x = 2,660.13 × 1,229.88
  4. Step 4: Simplify right side
    1,928.10x = 3,271,640.68
  5. Step 5: Solve for x
    x = 3,271,640.68/1,928.10
  6. Step 6: Final answer
    x = 1,696.82

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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.