react native asign width to image
First import Dimensions from react-native
import { Dimensions } from 'react-native';
then you have to get the dimensions of the window
const win = Dimensions.get('window');
Now calculate ratio as
const ratio = win.width/541; //541 is actual image width
now the add style to your image as
imageStyle: {
width: win.width,
height: 362 * ratio, //362 is actual height of image
}