400 m, Men
| Competition | 1978 South American Games |
|---|---|
| Venue |
La Paz
 BOL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Patricio Valenzuela |  CHI |
48.31 | ||
| 🥈 | Felipe Mascaró | CHI |
49.08 | ||
| 🥉 | Roberto Prado | BOL |
49.12 |
| Competition | 1978 South American Games |
|---|---|
| Venue |
La Paz
BOL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Patricio Valenzuela | CHI |
48.31 | ||
| 🥈 | Felipe Mascaró | CHI |
49.08 | ||
| 🥉 | Roberto Prado | BOL |
49.12 |