If `x/sqrt1.21=440`, then `x` is equal to:

Options

A. 484
B. 400
C. 532.4
D. 444

Answer

To solve the equation \( \frac{x}{\sqrt{1.21}} = 440 \), we will follow these steps:

### Step 1: Isolate \( x \)
To isolate \( x \), we can multiply both sides of the equation by \( \sqrt{1.21} \).

\[ x = 440 \times \sqrt{1.21} \]

### Step 2: Calculate \( \sqrt{1.21} \)
Next, we need to calculate \( \sqrt{1.21} \).

\[ \sqrt{1.21} = 1.1 \]

### Step 3: Substitute back into the equation
Now we substitute \( 1.1 \) back into the equation for \( x \).

\[ x = 440 \times 1.1 \]

### Step 4: Perform the multiplication
Now we perform the multiplication:

\[ x = 440 \times 1.1 = 484 \]

### Final Answer
Thus, the value of \( x \) is:

\[ \boxed{484} \]