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Finding the Fourth Proportional to 3,105.80, 4,658.70 and 2,760.20

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Solution

The fourth proportional to 3,105.80, 4,658.70 and 2,760.20 is: 4,140.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.80 : 4,658.70 = 2,760.20 : x
  2. Step 2: Convert to fraction form
    3,105.80/4,658.70 = 2,760.20/x
  3. Step 3: Cross multiply
    3,105.80x = 4,658.70 × 2,760.20
  4. Step 4: Simplify right side
    3,105.80x = 12,858,943.74
  5. Step 5: Solve for x
    x = 12,858,943.74/3,105.80
  6. Step 6: Final answer
    x = 4,140.30

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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.