To be absolutely sure, you should:
* Consult your owner's manual: This is the best source of information for your specific vehicle.
* Use a repair manual: A Haynes or Chilton repair manual for your year and model Ranger will have diagrams showing the fuel filter location.
* Search online for your specific engine: A search like "1998 Ford Ranger 4.0L fuel filter location" (replace 4.0L with your engine size) will likely yield images and forum discussions showing the location.
Be aware that working with fuel systems involves flammable materials. Take appropriate safety precautions, such as working in a well-ventilated area and avoiding sparks or open flames.