Good question! Here is a fixed phrase: "和(Or与)....相协调" means In harmony with something. Same use with "和(Or与)....相一致"。 Example: 我们必须确保人口的增长和环境相协调。

相 here is a short version of 相互 which means mutually or to each other. Eg: 相融 means 相互融合。相适应meas 相互适应。It means it works both ways.