.btImage3Col1x1 {
    padding: 15px;
}
.btImage3Col1x1 .column-content {
    height: 310px;
}
.btImage3Col1x1 .column-content img {
    display: block;
    max-width: 100%;
    height: 310px;
    width:100%;
}

/**
 * XS media queries
 */
@media (max-width:767px) {
    .btImage3Col1x1 {
        padding-bottom: 0;
    }
    .btImage3Col1x1 .column-content {
        height: auto;
    }
    .btImage3Col1x1 .column-content img {
        max-width: none;
        width: 100%;
        height: auto;
    }
}