Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km.?

Question

Find the latitude of Spokane, WA if Spokane and Jordan Valley,43.15 Degrees North OR, are 486km apart

Answer 1

Radius of the Earth = 6400km
Circumference (360 degrees) = 2pi*6400km
486km ----- 486/(2pi*6400) * 360 = 4.35° away from Jordan Valley.

From a map of the world, Spokane is north of Jordan Valley.
Latitude of Spokane is 43.15+4.35 = 47.5°N.

Answer 2

43.15+4.35 = 47.5 degrees