Home / 3,105.40-4,658.10-3,086.20

Finding the Fourth Proportional to 3,105.40, 4,658.10 and 3,086.20

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Solution

The fourth proportional to 3,105.40, 4,658.10 and 3,086.20 is: 4,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.40 : 4,658.10 = 3,086.20 : x
  2. Step 2: Convert to fraction form
    3,105.40/4,658.10 = 3,086.20/x
  3. Step 3: Cross multiply
    3,105.40x = 4,658.10 × 3,086.20
  4. Step 4: Simplify right side
    3,105.40x = 14,375,828.22
  5. Step 5: Solve for x
    x = 14,375,828.22/3,105.40
  6. Step 6: Final answer
    x = 4,629.30

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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.