[laimas]

Лучше тогда не forEach(), а map():

var positions = [
    'Bosh VZHIH-101',
    'Ariston WHO-D',
    'Atlant Mattel 2016',
    'Wirpool FLASH black edition',
    'Bosh VH1Z-024'
], 
prices = [
    10000,
    4800,
    9200,
    2500,
    5700
], 
obj = positions.map(function(item, index) {
    return {'name' : item, 'price' : prices[index]}
})

console.dir(obj)