Spawn endless platforms help

I'm trying to spawn endless platforms inside jumping distance of the player, and them make them spawn at the same distance away from each other. Anyone know how that could work from this? Right now the distance between the platforms grows everytime a platform spawns. The distance should stay the same every round. Need help with making the plaform distance more stable. Any other tips would also be nice of course.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class GameController : PhysicsObject
 {
 
     Vector3 platformSpawn;
     private GameObject[] platforms;
     public GameObject platformPrefab;
     private float timeSinseLastSpawned;
     public float spawnRate = 4f;
 
     public float platformMin = -1f;
     public float platformMax = 3.5f;
     public float spawnXPosition = 10f;
     private int currentPlatform = 0;
 
     public int platformPool = 5;
     private Vector2 platformsPossition = new Vector2(10f, 0f);
 
     void Start()
     {
         platforms = new GameObject[platformPool];
 
         for (int i = 0; i < platformPool; i++)
         {
             platforms[i] = (GameObject)Instantiate(platformPrefab, platformsPossition, Quaternion.identity);
         }
     }
 
     void Update()
     {
         timeSinseLastSpawned += Time.deltaTime;
 
         if(timeSinseLastSpawned >= spawnRate)
         {
             timeSinseLastSpawned = 0;
 
             float spawnYPosition = Random.Range(platformMin, platformMax);
             platforms[currentPlatform].transform.position = new Vector2(spawnXPosition, spawnYPosition);
 
             currentPlatform++;
             spawnXPosition += spawnXPosition;
 
             if (currentPlatform >= platformPool)
             {
                 currentPlatform = 0;
             }
         }
     }
 }