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Finding the Fourth Proportional to 2,855.63, 3,940.76 and 1,613.63

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Solution

The fourth proportional to 2,855.63, 3,940.76 and 1,613.63 is: 2,226.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.63 : 3,940.76 = 1,613.63 : x
  2. Step 2: Convert to fraction form
    2,855.63/3,940.76 = 1,613.63/x
  3. Step 3: Cross multiply
    2,855.63x = 3,940.76 × 1,613.63
  4. Step 4: Simplify right side
    2,855.63x = 6,358,912.89
  5. Step 5: Solve for x
    x = 6,358,912.89/2,855.63
  6. Step 6: Final answer
    x = 2,226.80

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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.