我国第一艘载人飞船，神舟五号飞行轨道的近地点高度为200km，近地点高度与远地点高度的比是4：7，求它的远地点高度。

数学题解答：这是正比例应用题。

设远地点高度为X千米。

200:X=4:7

4X=200×7

X=200×7÷４

X=350

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