Home / 2,028.70-2,797.68-1,398.22

Finding the Fourth Proportional to 2,028.70, 2,797.68 and 1,398.22

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Solution

The fourth proportional to 2,028.70, 2,797.68 and 1,398.22 is: 1,928.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,028.70 : 2,797.68 = 1,398.22 : x
  2. Step 2: Convert to fraction form
    2,028.70/2,797.68 = 1,398.22/x
  3. Step 3: Cross multiply
    2,028.70x = 2,797.68 × 1,398.22
  4. Step 4: Simplify right side
    2,028.70x = 3,911,772.13
  5. Step 5: Solve for x
    x = 3,911,772.13/2,028.70
  6. Step 6: Final answer
    x = 1,928.22

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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.