Home / 1,290.28-1,922.24-1,228.36

Finding the Fourth Proportional to 1,290.28, 1,922.24 and 1,228.36

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Solution

The fourth proportional to 1,290.28, 1,922.24 and 1,228.36 is: 1,829.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.28 : 1,922.24 = 1,228.36 : x
  2. Step 2: Convert to fraction form
    1,290.28/1,922.24 = 1,228.36/x
  3. Step 3: Cross multiply
    1,290.28x = 1,922.24 × 1,228.36
  4. Step 4: Simplify right side
    1,290.28x = 2,361,202.73
  5. Step 5: Solve for x
    x = 2,361,202.73/1,290.28
  6. Step 6: Final answer
    x = 1,829.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.