Home / 2,808.60-3,876.39-1,629.78

Finding the Fourth Proportional to 2,808.60, 3,876.39 and 1,629.78

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Solution

The fourth proportional to 2,808.60, 3,876.39 and 1,629.78 is: 2,249.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.60 : 3,876.39 = 1,629.78 : x
  2. Step 2: Convert to fraction form
    2,808.60/3,876.39 = 1,629.78/x
  3. Step 3: Cross multiply
    2,808.60x = 3,876.39 × 1,629.78
  4. Step 4: Simplify right side
    2,808.60x = 6,317,662.89
  5. Step 5: Solve for x
    x = 6,317,662.89/2,808.60
  6. Step 6: Final answer
    x = 2,249.40

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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.