Home / 3,109.20-4,662.45-1,028.40

Finding the Fourth Proportional to 3,109.20, 4,662.45 and 1,028.40

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Solution

The fourth proportional to 3,109.20, 4,662.45 and 1,028.40 is: 1,542.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.20 : 4,662.45 = 1,028.40 : x
  2. Step 2: Convert to fraction form
    3,109.20/4,662.45 = 1,028.40/x
  3. Step 3: Cross multiply
    3,109.20x = 4,662.45 × 1,028.40
  4. Step 4: Simplify right side
    3,109.20x = 4,794,863.58
  5. Step 5: Solve for x
    x = 4,794,863.58/3,109.20
  6. Step 6: Final answer
    x = 1,542.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.