Home / 2,979.97-4,110.49-1,919.11

Finding the Fourth Proportional to 2,979.97, 4,110.49 and 1,919.11

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Solution

The fourth proportional to 2,979.97, 4,110.49 and 1,919.11 is: 2,647.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.97 : 4,110.49 = 1,919.11 : x
  2. Step 2: Convert to fraction form
    2,979.97/4,110.49 = 1,919.11/x
  3. Step 3: Cross multiply
    2,979.97x = 4,110.49 × 1,919.11
  4. Step 4: Simplify right side
    2,979.97x = 7,888,482.46
  5. Step 5: Solve for x
    x = 7,888,482.46/2,979.97
  6. Step 6: Final answer
    x = 2,647.17

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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.