SOURCE

        var w = $(window).width();
        var scale = w / 1920;
        $('body').css({ transform: 'scale(' + scale + ')' });
        $(window).resize(function () {
            var w = $(window).width();
            var scale = w / 1920;
            $('body').css({ transform: 'scale(' + scale + ')' });
        });

<div class="plane">
        <div class="row">
            <div class="cos-3 bg-red">
                cos1
            </div>
            <div class="cos-3 bg-blue">
                cos2
            </div>
            <div class="cos-3 bg-green">
                cos3
            </div>
        </div>
    </div>

body {
            background-color: #03081c;
            width: 1920px;
            height: 1080px;
            transform-origin: left top;
        }
        body,div{
            padding:0;
            margin: 0;
        }
        .palne,.row{
            width: 1920px;
        }
        .cos-3{
            width: 640px;
            float: left;
            height: 200px;
            line-height: 200px;
            text-align: center;
        }
        .bg-red{
            background: red;
        }
        .bg-blue{
            background: blue;
        }
        .bg-green{
            background: green
        }