Home / 2,979.09-4,105.49-2,906.19

Finding the Fourth Proportional to 2,979.09, 4,105.49 and 2,906.19

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Solution

The fourth proportional to 2,979.09, 4,105.49 and 2,906.19 is: 4,005.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.09 : 4,105.49 = 2,906.19 : x
  2. Step 2: Convert to fraction form
    2,979.09/4,105.49 = 2,906.19/x
  3. Step 3: Cross multiply
    2,979.09x = 4,105.49 × 2,906.19
  4. Step 4: Simplify right side
    2,979.09x = 11,931,319.45
  5. Step 5: Solve for x
    x = 11,931,319.45/2,979.09
  6. Step 6: Final answer
    x = 4,005.02

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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.