Home / 2,855.10-3,940.20-1,613.10

Finding the Fourth Proportional to 2,855.10, 3,940.20 and 1,613.10

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Solution

The fourth proportional to 2,855.10, 3,940.20 and 1,613.10 is: 2,226.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.10 : 3,940.20 = 1,613.10 : x
  2. Step 2: Convert to fraction form
    2,855.10/3,940.20 = 1,613.10/x
  3. Step 3: Cross multiply
    2,855.10x = 3,940.20 × 1,613.10
  4. Step 4: Simplify right side
    2,855.10x = 6,355,936.62
  5. Step 5: Solve for x
    x = 6,355,936.62/2,855.10
  6. Step 6: Final answer
    x = 2,226.17

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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.