The fourth funnel of the RMS Titanic was fake designed to make the ship look more powerful and symmetrical.

The story behind the answer

True. Titanic’s engines required only three working funnels to vent boiler exhaust, but White Star Line fitted a fourth “dummy” funnel to make the ship look more powerful, modern, and symmetrical. That fourth stack mainly served as ventilation for the kitchens and engine rooms and might emit light smoke, but it wasn’t connected to the boilers.

In the early 1900s, more funnels signaled speed, safety, and prestige—an ocean-liner marketing arms race inspired by famous four‑stackers like Lusitania and Mauretania. Titanic followed the look, even though technology no longer demanded it. Memory tip: “Three for fire, one for show”—three funnels did the work; the fourth sold the image.