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Finding the Fourth Proportional to 2,855.72, 3,940.18 and 1,676.57

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Solution

The fourth proportional to 2,855.72, 3,940.18 and 1,676.57 is: 2,313.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.72 : 3,940.18 = 1,676.57 : x
  2. Step 2: Convert to fraction form
    2,855.72/3,940.18 = 1,676.57/x
  3. Step 3: Cross multiply
    2,855.72x = 3,940.18 × 1,676.57
  4. Step 4: Simplify right side
    2,855.72x = 6,605,963.69
  5. Step 5: Solve for x
    x = 6,605,963.69/2,855.72
  6. Step 6: Final answer
    x = 2,313.24

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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.