Home / 3,105.10-4,278.99-2,218.42

Finding the Fourth Proportional to 3,105.10, 4,278.99 and 2,218.42

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Solution

The fourth proportional to 3,105.10, 4,278.99 and 2,218.42 is: 3,057.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.10 : 4,278.99 = 2,218.42 : x
  2. Step 2: Convert to fraction form
    3,105.10/4,278.99 = 2,218.42/x
  3. Step 3: Cross multiply
    3,105.10x = 4,278.99 × 2,218.42
  4. Step 4: Simplify right side
    3,105.10x = 9,492,597.00
  5. Step 5: Solve for x
    x = 9,492,597.00/3,105.10
  6. Step 6: Final answer
    x = 3,057.10

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Half scale
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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.