Home / 3,078.70-4,247.13-2,238.10

Finding the Fourth Proportional to 3,078.70, 4,247.13 and 2,238.10

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Solution

The fourth proportional to 3,078.70, 4,247.13 and 2,238.10 is: 3,087.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.70 : 4,247.13 = 2,238.10 : x
  2. Step 2: Convert to fraction form
    3,078.70/4,247.13 = 2,238.10/x
  3. Step 3: Cross multiply
    3,078.70x = 4,247.13 × 2,238.10
  4. Step 4: Simplify right side
    3,078.70x = 9,505,501.65
  5. Step 5: Solve for x
    x = 9,505,501.65/3,078.70
  6. Step 6: Final answer
    x = 3,087.51

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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.